Compare 664681 vs 664691
| Property | 664681 | 664691 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 1011 × 65811 | 6646911 |
| Prime factorization | 101 × 6581 | 664691 |
| Divisors count | 4 | 2 |
| Divisors | 1, 101, 6581, 664681 | 1, 664691 |
| Number of properties | 1 | 5 |
| Chen primes | 21093rd | |
| Cousin primes (2nd member) | 5814th | |
| Primes | 53926th | |
| Prime triplets (2nd member) | 2122nd | |
| Semiprimes | 142191st | |
| Twin primes (1st member) | 5823rd | |
| Roman numberals | ||
| Base 2 | 101000100100011010012 | 101000100100011100112 |
| Base 3 | 10202022022113 | 10202022100123 |
| Base 4 | 22021012214 | 22021013034 |
| Base 5 | 1322322115 | 1322322315 |
| Base 6 | 221251216 | 221251356 |
| Base 7 | 54355637 | 54356067 |
| Base 8 | 24221518 | 24221638 |
| Base 9 | 12226849 | 12227059 |
| Base 10 | 66468110 | 66469110 |
| Base 11 | 41442611 | 41443511 |
| Base 12 | 2807a112 | 2807ab12 |
| Base 13 | 1a370413 | 1a371113 |
| Base 14 | 13433314 | 13433d14 |
| Base 15 | d1e2115 | d1e2b15 |
| Base 16 | a246916 | a247316 |