Compare 1660 vs 1667
| Property | 1660 | 1667 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 22 × 51 × 831 | 16671 |
| Prime factorization | 2 × 2 × 5 × 83 | 1667 |
| Divisors count | 12 | 2 |
| Divisors | 1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660 | 1, 1667 |
| Number of properties | 0 | 6 |
| Chen primes | 165th | |
| Cousin primes (2nd member) | 59th | |
| Harmonic primes | 92nd | |
| Primes | 262nd | |
| Prime triplets (2nd member) | 43rd | |
| Twin primes (1st member) | 53rd | |
| Roman numberals | MDCLX | MDCLXVII |
| Base 2 | 110011111002 | 110100000112 |
| Base 3 | 20211113 | 20212023 |
| Base 4 | 1213304 | 1220034 |
| Base 5 | 231205 | 231325 |
| Base 6 | 114046 | 114156 |
| Base 7 | 45617 | 46017 |
| Base 8 | 31748 | 32038 |
| Base 9 | 22449 | 22529 |
| Base 10 | 166010 | 166710 |
| Base 11 | 127a11 | 128611 |
| Base 12 | b6412 | b6b12 |
| Base 13 | 9a913 | 9b313 |
| Base 14 | 86814 | 87114 |
| Base 15 | 75a15 | 76215 |
| Base 16 | 67c16 | 68316 |