Compare 601 vs 661
| Property | 601 | 661 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6011 | 6611 |
| Prime factorization | 601 | 661 |
| Divisors count | 2 | 2 |
| Divisors | 1, 601 | 1, 661 |
| Number of properties | 8 | 5 |
| Additive primes | 60th | 65th |
| Centered decagonal primes | 8th | |
| Lucky primes | 29th | |
| Primes | 110th | 121st |
| Pythagorean primes | 52nd | 57th |
| Sexy primes (1st member) | 54th | |
| Sexy prime quadrupletss (1st member) | 6th | |
| Sexy prime triplets (1st member) | 22nd | |
| Twin primes (2nd member) | 27th | 30th |
| Roman numberals | DCI | DCLXI |
| Base 2 | 10010110012 | 10100101012 |
| Base 3 | 2110213 | 2201113 |
| Base 4 | 211214 | 221114 |
| Base 5 | 44015 | 101215 |
| Base 6 | 24416 | 30216 |
| Base 7 | 15167 | 16337 |
| Base 8 | 11318 | 12258 |
| Base 9 | 7379 | 8149 |
| Base 10 | 60110 | 66110 |
| Base 11 | 4a711 | 55111 |
| Base 12 | 42112 | 47112 |
| Base 13 | 37313 | 3bb13 |
| Base 14 | 30d14 | 35314 |
| Base 15 | 2a115 | 2e115 |
| Base 16 | 25916 | 29516 |