Compare 666557 vs 666989
| Property | 666557 | 666989 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6665571 | 6669891 |
| Prime factorization | 666557 | 666989 |
| Divisors count | 2 | 2 |
| Divisors | 1, 666557 | 1, 666989 |
| Number of properties | 3 | 4 |
| Chen primes | 21138th | 21147th |
| Isolated primes | 42418th | |
| Primes | 54062nd | 54095th |
| Sexy primes (2nd member) | 11671st | |
| Twin primes (1st member) | 5836th | |
| Roman numberals | ||
| Base 2 | 101000101011101111012 | 101000101101011011012 |
| Base 3 | 10202121000223 | 10202122210223 |
| Base 4 | 22022323314 | 22023112314 |
| Base 5 | 1323122125 | 1323204245 |
| Base 6 | 221415256 | 221435256 |
| Base 7 | 54442137 | 54454017 |
| Base 8 | 24256758 | 24265558 |
| Base 9 | 12253089 | 12258389 |
| Base 10 | 66655710 | 66698910 |
| Base 11 | 41588111 | 41613411 |
| Base 12 | 2818a512 | 281ba512 |
| Base 13 | 1a451813 | 1a478b13 |
| Base 14 | 134cb314 | 13510114 |
| Base 15 | d277215 | d295e15 |
| Base 16 | a2bbd16 | a2d6d16 |