Compare 1666 vs 1671
| Property | 1666 | 1671 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 21 × 72 × 171 | 31 × 5571 |
| Prime factorization | 2 × 7 × 7 × 17 | 3 × 557 |
| Divisors count | 12 | 4 |
| Divisors | 1, 2, 7, 14, 17, 34, 49, 98, 119, 238, 833, 1666 | 1, 3, 557, 1671 |
| Number of properties | 0 | 1 |
| Semiprimes | 480th | |
| Roman numberals | MDCLXVI | MDCLXXI |
| Base 2 | 110100000102 | 110100001112 |
| Base 3 | 20212013 | 20212203 |
| Base 4 | 1220024 | 1220134 |
| Base 5 | 231315 | 231415 |
| Base 6 | 114146 | 114236 |
| Base 7 | 46007 | 46057 |
| Base 8 | 32028 | 32078 |
| Base 9 | 22519 | 22569 |
| Base 10 | 166610 | 167110 |
| Base 11 | 128511 | 128a11 |
| Base 12 | b6a12 | b7312 |
| Base 13 | 9b213 | 9b713 |
| Base 14 | 87014 | 87514 |
| Base 15 | 76115 | 76615 |
| Base 16 | 68216 | 68716 |