Compare 666989 vs 667081
| Property | 666989 | 667081 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6669891 | 6670811 |
| Prime factorization | 666989 | 667081 |
| Divisors count | 2 | 2 |
| Divisors | 1, 666989 | 1, 667081 |
| Number of properties | 4 | 5 |
| Chen primes | 21147th | 21150th |
| Isolated primes | 42418th | 42420th |
| Lucky primes | 6188th | |
| Primes | 54095th | 54099th |
| Sexy primes (2nd member) | 11671st | |
| Ulam primes | 3972nd | |
| Roman numberals | ||
| Base 2 | 101000101101011011012 | 101000101101110010012 |
| Base 3 | 10202122210223 | 10202200012013 |
| Base 4 | 22023112314 | 22023130214 |
| Base 5 | 1323204245 | 1323213115 |
| Base 6 | 221435256 | 221442016 |
| Base 7 | 54454017 | 54455627 |
| Base 8 | 24265558 | 24267118 |
| Base 9 | 12258389 | 12260519 |
| Base 10 | 66698910 | 66708110 |
| Base 11 | 41613411 | 41620811 |
| Base 12 | 281ba512 | 28206112 |
| Base 13 | 1a478b13 | 1a482c13 |
| Base 14 | 13510114 | 13516914 |
| Base 15 | d295e15 | d29c115 |
| Base 16 | a2d6d16 | a2dc916 |