Compare 661 vs 1051
| Property | 661 | 1051 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6611 | 10511 |
| Prime factorization | 661 | 1051 |
| Divisors count | 2 | 2 |
| Divisors | 1, 661 | 1, 1051 |
| Number of properties | 5 | 5 |
| Additive primes | 65th | 95th |
| Centered decagonal primes | 8th | 10th |
| Long primes | 64th | |
| Primes | 121st | 177th |
| Pythagorean primes | 57th | |
| Twin primes (2nd member) | 30th | 38th |
| Roman numberals | DCLXI | MLI |
| Base 2 | 10100101012 | 100000110112 |
| Base 3 | 2201113 | 11022213 |
| Base 4 | 221114 | 1001234 |
| Base 5 | 101215 | 132015 |
| Base 6 | 30216 | 45116 |
| Base 7 | 16337 | 30317 |
| Base 8 | 12258 | 20338 |
| Base 9 | 8149 | 13879 |
| Base 10 | 66110 | 105110 |
| Base 11 | 55111 | 87611 |
| Base 12 | 47112 | 73712 |
| Base 13 | 3bb13 | 62b13 |
| Base 14 | 35314 | 55114 |
| Base 15 | 2e115 | 4a115 |
| Base 16 | 29516 | 41b16 |