Compare 1866 vs 1867
| Property | 1866 | 1867 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 31 × 3111 | 18671 |
| Prime factorization | 2 × 3 × 311 | 1867 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 3, 6, 311, 622, 933, 1866 | 1, 1867 |
| Number of properties | 0 | 12 |
| Cousin primes (1st member) | 62nd | |
| Emirps | 90th | |
| Good primes | 59th | |
| Isolated primes | 174th | |
| Primes | 285th | |
| Prime quintuplet 1s (1st member) | 3rd | |
| Prime triplets (1st member) | 46th | |
| Sexy primes (1st member) | 121st | |
| Sexy primes (2nd member) | 120th | |
| Sexy prime quadrupletss (2nd member) | 12th | |
| Sexy prime triplets (1st member) | 48th | |
| Sexy prime triplets (2nd member) | 47th | |
| Roman numberals | MDCCCLXVI | MDCCCLXVII |
| Base 2 | 111010010102 | 111010010112 |
| Base 3 | 21200103 | 21200113 |
| Base 4 | 1310224 | 1310234 |
| Base 5 | 244315 | 244325 |
| Base 6 | 123506 | 123516 |
| Base 7 | 53047 | 53057 |
| Base 8 | 35128 | 35138 |
| Base 9 | 25039 | 25049 |
| Base 10 | 186610 | 186710 |
| Base 11 | 144711 | 144811 |
| Base 12 | 10b612 | 10b712 |
| Base 13 | b0713 | b0813 |
| Base 14 | 97414 | 97514 |
| Base 15 | 84615 | 84715 |
| Base 16 | 74a16 | 74b16 |