60,000

Selected numbers in the range 60,000–69,999

60,001 to 60,999

• 60,049 – Leyland number

  61,000 to 61,999

62,000 to 62,999

• 62,208 – 3-smooth number
• 62,210 – Markov number
• 62,745 – Carmichael number

  63,000 to 63,999

• 63,020 – amicable number with 76084
• 63,360 – inches in a mile
• 63,750 – pentagonal pyramidal number
• 63,973 – Carmichael number

  64,000 to 64,999

• 64,000 – 40³; also 64,000 Dollar Question
• 64,009 – sum of the cubes of the first 22 positive integers
• 64,079 – Lucas number

  65,000 to 65,999

• 65,023 – Carol number
• 65,025 – 255², palindromic in base 11
• 65,279 – Unicode code point for byte order mark
• 65,534 – Unicode code point guaranteed not to be a character
• 65,535 – largest value for an unsigned 16-bit integer on a computer.
• 65,536 – 2¹⁶, also 2↑↑4 using Knuth's up-arrow notation, smallest integer with exactly 17 divisors. palindromic in base 15
• 65,537 – largest known Fermat prime
• 65,539 – the 6544th prime number, and both 6544 and 65539 have digital root of 1; a regular prime; a larger member of a twin prime pair; a smaller member of a cousin prime pair; a happy prime; a weak prime; a middle member of a prime triplet, ; a middle member of a three-term primes in arithmetic progression,.
• 65,792 – Leyland number

  66,000 to 66,999

• 66,012 – tribonacci number
• 66,047 – Kynea number
• 66,049 – 257², palindromic in hexadecimal
• 66,198 – Giuga number
• 66,666 – repdigit

  67,000 to 67,999

• 67,081 – 259², palindromic in base 6
• 67,607 – largest of five remaining Seventeen or Bust numbers in the Sierpiński problem
• 67,626 – pentagonal pyramidal number

  68,000 to 68,999

• 68,000 – Motorola 68000, a processor used in Apple Macintosh computers before PowerPC
• 68,008 – Motorola 68008, a processor used in Sinclair QL computer
• 68,020 – Motorola 68020, a processor used in Apple Macintosh computers before PowerPC
• 68,030 – Motorola 68030, a processor used in Apple Macintosh computers before PowerPC
• 68,040 – Motorola 68040, a processor used in Apple Macintosh computers before PowerPC
• 68,881 – Motorola 68881, a math coprocessor used in with 68020 and 68030
• 68,882 – Motorola 68881, a math coprocessor used in with 68020 and 68030
• 68,921 – 41³

  69,000 to 69,999

• 69,105 – Infocom in-joke
• 69,632 – Leyland number
• 69,696 – square of 264; only known palindromic square that can be expressed as the sum of a pair of twin primes: 69,696 = 34847 + 34849.
• 69,984 – 3-smooth number