Compare 1666 vs 1678
| Property | 1666 | 1678 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 21 × 72 × 171 | 21 × 8391 |
| Prime factorization | 2 × 7 × 7 × 17 | 2 × 839 |
| Divisors count | 12 | 4 |
| Divisors | 1, 2, 7, 14, 17, 34, 49, 98, 119, 238, 833, 1666 | 1, 2, 839, 1678 |
| Number of properties | 0 | 1 |
| Semiprimes | 482nd | |
| Roman numberals | MDCLXVI | MDCLXXVIII |
| Base 2 | 110100000102 | 110100011102 |
| Base 3 | 20212013 | 20220113 |
| Base 4 | 1220024 | 1220324 |
| Base 5 | 231315 | 232035 |
| Base 6 | 114146 | 114346 |
| Base 7 | 46007 | 46157 |
| Base 8 | 32028 | 32168 |
| Base 9 | 22519 | 22649 |
| Base 10 | 166610 | 167810 |
| Base 11 | 128511 | 129611 |
| Base 12 | b6a12 | b7a12 |
| Base 13 | 9b213 | 9c113 |
| Base 14 | 87014 | 87c14 |
| Base 15 | 76115 | 76d15 |
| Base 16 | 68216 | 68e16 |