Compare 666137 vs 666139
| Property | 666137 | 666139 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 7511 × 8871 | 6661391 |
| Prime factorization | 751 × 887 | 666139 |
| Divisors count | 4 | 2 |
| Divisors | 1, 751, 887, 666137 | 1, 666139 |
| Number of properties | 1 | 4 |
| Additive primes | 21093rd | |
| Cousin primes (1st member) | 5825th | |
| Isolated primes | 42372nd | |
| Primes | 54035th | |
| Semiprimes | 142484th | |
| Roman numberals | ||
| Base 2 | 101000101010000110012 | 101000101010000110112 |
| Base 3 | 10202112022023 | 10202112022113 |
| Base 4 | 22022201214 | 22022201234 |
| Base 5 | 1323040225 | 1323040245 |
| Base 6 | 221355456 | 221355516 |
| Base 7 | 54430437 | 54430457 |
| Base 8 | 24250318 | 24250338 |
| Base 9 | 12246829 | 12246849 |
| Base 10 | 66613710 | 66613910 |
| Base 11 | 41552a11 | 41553111 |
| Base 12 | 2815b512 | 2815b712 |
| Base 13 | 1a428413 | 1a428613 |
| Base 14 | 134a9314 | 134a9514 |
| Base 15 | d259215 | d259415 |
| Base 16 | a2a1916 | a2a1b16 |