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6000 (six thousand) is thenatural number following 5999 and preceding 6001.

• 6025 – Stage name of rhythm guitarist of theDead Kennedys from June 1978 to March 1979. Full name isCarlos Cadona.
• 6028 –centered heptagonal number^[1]
• 6037 –super-prime, prime of the form 2p-1
• 6042 –6042 Cheshirecat is aMars-crossing asteroid.
• 6047 –safe prime
• 6053 –Sophie Germain prime
• 6069 –nonagonal number^[2]
• 6073 –balanced prime
• 6079 – The serial number Winston Smith is referred to as in theGeorge Orwell novelNineteen Eighty-Four
• 6084 = 78², sum of the cubes of the first twelve integers
• 6081 - sum of the first 54 primes
• 6089 –highly cototient number^[3]
• 6095 –magic constant ofn ×n normalmagic square andn-Queens Problem forn = 23.

• 6101 – Sophie Germain prime
• 6105 –triangular number
• 6113 – Sophie Germain prime,super-prime
• 6121 – prime of the form 2p-1
• 6131 – Sophie Germain prime,twin prime with 6133
• 6133 – 800th prime number, twin prime with 6131
• 6143 –Thabit number
• 6144 –3-smooth number (2¹¹×3)
• 6173 – Sophie Germain prime
• 6174 – Kaprekar's constant
• 6181 –octahedral number^[4]

• 6200 –harmonic divisor number^[5]
• 6201 –square pyramidal number^[6]
• 6216 – triangular number
• 6217 –super-prime, prime of the form 2p-1
• 6229 –super-prime
• 6232 –amicable number with 6368
• 6236 – Most widely accepted figure for the number of verses in theQur'an^{[citation needed]}
• 6241 = 79²,centered octagonal number^[7]
• 6250 –Leyland number^[8]
• 6263 – Sophie Germain prime, balanced prime
• 6269 – Sophie Germain prime
• 6280 –decagonal number^[9]

• 6311 –super-prime
• 6317 – balanced prime
• 6322 – centered heptagonal number^[1]
• 6323 – Sophie Germain prime, balanced prime,super-prime
• 6328 – triangular number
• 6329 – Sophie Germain prime
• 6337 - star prime
• 6338 - sum of the first 55 primes
• 6346 – Number of verses in theQur'an according to the sect founded byRashad Khalifa.^[10]
• 6348 –pentagonal pyramidal number^[11]
• 6361 – prime of the form 2p-1, twin prime
• 6364 – nonagonal number^[2]
• 6367 – balanced prime
• 6368 – amicable number with 6232
• 6373 – balanced prime, sum of three and seven consecutive primes (2113 + 2129 + 2131 and 883 + 887 + 907 + 911 + 919 + 929 + 937)
• 6397 – sum of three consecutive primes (2129 + 2131 + 2137)
• 6399 – smallest integer that cannot be expressed as a sum of fewer than 279 eighth powers

• 6400 = 80²
• 6408 – sum of the squares of the first thirteen primes
• 6441 – triangular number
• 6449 – Sophie Germain prime
• 6466 –Markov number^[12]
• 6480 – smallest number with exactly 50 factors
• 6491 – Sophie Germain prime

• 6502 – model number of theMOS Technology 6502 which equipped early computers such as the Apple I and II, Commodore PET, Atari and others.
• 6509 – highly cototient number^[13]
• 6521 –Sophie Germain prime
• 6542 – number of primes${\displaystyle \le 2^{16}}$.^[14]
• 6545 –tetrahedral number^[15]
• 6551 – Sophie Germain prime
• 6555 – triangular number
• 6556 – member of aRuth-Aaron pair with 6557 (first definition)
• 6557 – member of a Ruth-Aaron pair with 6556 (first definition)
• 6561 = 81² = 9⁴ =3⁸,perfect totient number^[16]
• 6563 – Sophie Germain prime
• 6581 – Sophie Germain prime
• 6599 – safe prime

• 6601 -Carmichael number,^[17] decagonal number,^[9] sum of the first 56 primes
• 6623 – centered heptagonal number^[1]
• 6659 – safe prime
• 6666 – forty-fourth nonagonal number,^[2] and the 11ththird-convolution ofFibonacci numbers.^[18] InChristian demonology it represents thenumber of demons in a legion of demons.^{[citation needed]}
• 6670 –triangular number,^[19]centered nonagonal number,^[20] centered 19-gonal number,^[21]

• 6719 – safe prime, highly cototient number^[13]
• 6724 = 82²
• 6733 - star prime
• 6728 – number of domino tilings of a 6×6checkerboard
• 6761 – Sophie Germain prime
• 6765 – 20thFibonacci number^[22]
• 6779 – safe prime
• 6786 – triangular number

• 6811 – member of a Ruth-Aaron pair with 6812 (first definition)
• 6812 – member of a Ruth-Aaron pair with 6811 (first definition)
• 6827 – safe prime
• 6841 - largestright-truncatable prime in base 7
• 6842 – number of parallelogram polyominoes with 12 cells^[23]
• 6859 = 19³
• 6863 – balanced prime
• 6870 - sum of the first 57 primes
• 6879 – number of planar partitions of 15^[24]
• 6880 –vampire number^[25]
• 6889 = 83², centered octagonal number^[7]
• 6899 – Sophie Germain prime, safe prime

• 6903 – triangular number
• 6912 –3-smooth number (2⁸×3³)
• 6924 –magic constant ofn ×n normalmagic square andn-Queens Problem forn = 24.
• 6929 – highly cototient number^[13]
• 6930 – decagonal number,^[9] square pyramidal number^[6]
• 6931 – centered heptagonal number^[1]
• 6969 – 2015 comedicprogressive rock song by the bandNinja Sex Party
• 6975 – nonagonal number
• 6977 – balanced prime
• 6983 – Sophie Germain prime, safe prime
• 6997 – 900th prime number

There are 117prime numbers between 6000 and 7000:^[26][27]

6007, 6011, 6029, 6037, 6043, 6047, 6053, 6067, 6073, 6079, 6089, 6091, 6101, 6113, 6121, 6131, 6133, 6143, 6151, 6163, 6173, 6197, 6199, 6203, 6211, 6217, 6221, 6229, 6247, 6257, 6263, 6269, 6271, 6277, 6287, 6299, 6301, 6311, 6317, 6323, 6329, 6337, 6343, 6353, 6359, 6361, 6367, 6373, 6379, 6389, 6397, 6421, 6427, 6449, 6451, 6469, 6473, 6481, 6491, 6521, 6529, 6547, 6551, 6553, 6563, 6569, 6571, 6577, 6581, 6599, 6607, 6619, 6637, 6653, 6659, 6661, 6673, 6679, 6689, 6691, 6701, 6703, 6709, 6719, 6733, 6737, 6761, 6763, 6779, 6781, 6791, 6793, 6803, 6823, 6827, 6829, 6833, 6841, 6857, 6863, 6869, 6871, 6883, 6899, 6907, 6911, 6917, 6947, 6949, 6959, 6961, 6967, 6971, 6977, 6983, 6991, 6997

• Year 6000

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