Compare 6681 vs 6691
| Property | 6681 | 6691 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 171 × 1311 | 66911 |
| Prime factorization | 3 × 17 × 131 | 6691 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 17, 51, 131, 393, 2227, 6681 | 1, 6691 |
| Number of properties | 0 | 4 |
| Long primes | 331st | |
| Primes | 863rd | |
| Super primes | 150th | |
| Twin primes (2nd member) | 154th | |
| Roman numberals | ||
| Base 2 | 11010000110012 | 11010001000112 |
| Base 3 | 1000111103 | 1000112113 |
| Base 4 | 12201214 | 12202034 |
| Base 5 | 2032115 | 2032315 |
| Base 6 | 505336 | 505516 |
| Base 7 | 253237 | 253367 |
| Base 8 | 150318 | 150438 |
| Base 9 | 101439 | 101549 |
| Base 10 | 668110 | 669110 |
| Base 11 | 502411 | 503311 |
| Base 12 | 3a4912 | 3a5712 |
| Base 13 | 306c13 | 307913 |
| Base 14 | 261314 | 261d14 |
| Base 15 | 1ea615 | 1eb115 |
| Base 16 | 1a1916 | 1a2316 |