Compare 661679 vs 661690
| Property | 661679 | 661690 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 6616791 | 21 × 51 × 661691 |
| Prime factorization | 661679 | 2 × 5 × 66169 |
| Divisors count | 2 | 8 |
| Divisors | 1, 661679 | 1, 2, 5, 10, 66169, 132338, 330845, 661690 |
| Number of properties | 6 | 0 |
| Chen primes | 21001st | |
| Happy primes | 7612th | |
| Isolated primes | 42111th | |
| Primes | 53696th | |
| Safe primes | 3101st | |
| Sexy primes (2nd member) | 11595th | |
| Roman numberals | ||
| Base 2 | 101000011000101011112 | 101000011000101110102 |
| Base 3 | 10201211221223 | 10201212000013 |
| Base 4 | 22012022334 | 22012023224 |
| Base 5 | 1321332045 | 1321332305 |
| Base 6 | 221031556 | 221032146 |
| Base 7 | 54240447 | 54240617 |
| Base 8 | 24142578 | 24142728 |
| Base 9 | 12175789 | 12176019 |
| Base 10 | 66167910 | 66169010 |
| Base 11 | 41214711 | 41215711 |
| Base 12 | 27aabb12 | 27ab0a12 |
| Base 13 | 1a223513 | 1a224313 |
| Base 14 | 1331cb14 | 1331d814 |
| Base 15 | d10be15 | d10ca15 |
| Base 16 | a18af16 | a18ba16 |