Compare 1660 vs 1666
| Property | 1660 | 1666 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 4 | 4 |
| Prime factorization | 22 × 51 × 831 | 21 × 72 × 171 |
| Prime factorization | 2 × 2 × 5 × 83 | 2 × 7 × 7 × 17 |
| Divisors count | 12 | 12 |
| Divisors | 1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660 | 1, 2, 7, 14, 17, 34, 49, 98, 119, 238, 833, 1666 |
| Number of properties | 0 | 0 |
| Roman numberals | MDCLX | MDCLXVI |
| Base 2 | 110011111002 | 110100000102 |
| Base 3 | 20211113 | 20212013 |
| Base 4 | 1213304 | 1220024 |
| Base 5 | 231205 | 231315 |
| Base 6 | 114046 | 114146 |
| Base 7 | 45617 | 46007 |
| Base 8 | 31748 | 32028 |
| Base 9 | 22449 | 22519 |
| Base 10 | 166010 | 166610 |
| Base 11 | 127a11 | 128511 |
| Base 12 | b6412 | b6a12 |
| Base 13 | 9a913 | 9b213 |
| Base 14 | 86814 | 87014 |
| Base 15 | 75a15 | 76115 |
| Base 16 | 67c16 | 68216 |