Compare 664 vs 665
| Property | 664 | 665 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 3 |
| Total factors | 4 | 3 |
| Prime factorization | 23 × 831 | 51 × 71 × 191 |
| Prime factorization | 2 × 2 × 2 × 83 | 5 × 7 × 19 |
| Divisors count | 8 | 8 |
| Divisors | 1, 2, 4, 8, 83, 166, 332, 664 | 1, 5, 7, 19, 35, 95, 133, 665 |
| Number of properties | 0 | 0 |
| Roman numberals | DCLXIV | DCLXV |
| Base 2 | 10100110002 | 10100110012 |
| Base 3 | 2201213 | 2201223 |
| Base 4 | 221204 | 221214 |
| Base 5 | 101245 | 101305 |
| Base 6 | 30246 | 30256 |
| Base 7 | 16367 | 16407 |
| Base 8 | 12308 | 12318 |
| Base 9 | 8179 | 8189 |
| Base 10 | 66410 | 66510 |
| Base 11 | 55411 | 55511 |
| Base 12 | 47412 | 47512 |
| Base 13 | 3c113 | 3c213 |
| Base 14 | 35614 | 35714 |
| Base 15 | 2e415 | 2e515 |
| Base 16 | 29816 | 29916 |