Compare 1665 vs 1666
| Property | 1665 | 1666 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 4 | 4 |
| Prime factorization | 32 × 51 × 371 | 21 × 72 × 171 |
| Prime factorization | 3 × 3 × 5 × 37 | 2 × 7 × 7 × 17 |
| Divisors count | 12 | 12 |
| Divisors | 1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665 | 1, 2, 7, 14, 17, 34, 49, 98, 119, 238, 833, 1666 |
| Number of properties | 0 | 0 |
| Roman numberals | MDCLXV | MDCLXVI |
| Base 2 | 110100000012 | 110100000102 |
| Base 3 | 20212003 | 20212013 |
| Base 4 | 1220014 | 1220024 |
| Base 5 | 231305 | 231315 |
| Base 6 | 114136 | 114146 |
| Base 7 | 45667 | 46007 |
| Base 8 | 32018 | 32028 |
| Base 9 | 22509 | 22519 |
| Base 10 | 166510 | 166610 |
| Base 11 | 128411 | 128511 |
| Base 12 | b6912 | b6a12 |
| Base 13 | 9b113 | 9b213 |
| Base 14 | 86d14 | 87014 |
| Base 15 | 76015 | 76115 |
| Base 16 | 68116 | 68216 |