Compare 666129 vs 666139
| Property | 666129 | 666139 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 2220431 | 6661391 |
| Prime factorization | 3 × 222043 | 666139 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 222043, 666129 | 1, 666139 |
| Number of properties | 1 | 4 |
| Additive primes | 21093rd | |
| Cousin primes (1st member) | 5825th | |
| Isolated primes | 42372nd | |
| Primes | 54035th | |
| Semiprimes | 142481st | |
| Roman numberals | ||
| Base 2 | 101000101010000100012 | 101000101010000110112 |
| Base 3 | 10202112021103 | 10202112022113 |
| Base 4 | 22022201014 | 22022201234 |
| Base 5 | 1323040045 | 1323040245 |
| Base 6 | 221355336 | 221355516 |
| Base 7 | 54430327 | 54430457 |
| Base 8 | 24250218 | 24250338 |
| Base 9 | 12246739 | 12246849 |
| Base 10 | 66612910 | 66613910 |
| Base 11 | 41552211 | 41553111 |
| Base 12 | 2815a912 | 2815b712 |
| Base 13 | 1a427913 | 1a428613 |
| Base 14 | 134a8914 | 134a9514 |
| Base 15 | d258915 | d259415 |
| Base 16 | a2a1116 | a2a1b16 |