Compare 1660 vs 1663
| Property | 1660 | 1663 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 22 × 51 × 831 | 16631 |
| Prime factorization | 2 × 2 × 5 × 83 | 1663 |
| Divisors count | 12 | 2 |
| Divisors | 1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660 | 1, 1663 |
| Number of properties | 0 | 11 |
| Cousin primes (1st member) | 59th | |
| Happy primes | 50th | |
| Harmonic primes | 91st | |
| Isolated primes | 158th | |
| Long primes | 102nd | |
| Lucky primes | 62nd | |
| Primes | 261st | |
| Prime triplets (1st member) | 43rd | |
| Sexy primes (1st member) | 113th | |
| Sexy primes (2nd member) | 112th | |
| Sexy prime triplets (2nd member) | 43rd | |
| Roman numberals | MDCLX | MDCLXIII |
| Base 2 | 110011111002 | 110011111112 |
| Base 3 | 20211113 | 20211213 |
| Base 4 | 1213304 | 1213334 |
| Base 5 | 231205 | 231235 |
| Base 6 | 114046 | 114116 |
| Base 7 | 45617 | 45647 |
| Base 8 | 31748 | 31778 |
| Base 9 | 22449 | 22479 |
| Base 10 | 166010 | 166310 |
| Base 11 | 127a11 | 128211 |
| Base 12 | b6412 | b6712 |
| Base 13 | 9a913 | 9ac13 |
| Base 14 | 86814 | 86b14 |
| Base 15 | 75a15 | 75d15 |
| Base 16 | 67c16 | 67f16 |