Compare 1965 vs 1966
| Property | 1965 | 1966 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 31 × 51 × 1311 | 21 × 9831 |
| Prime factorization | 3 × 5 × 131 | 2 × 983 |
| Divisors count | 8 | 4 |
| Divisors | 1, 3, 5, 15, 131, 393, 655, 1965 | 1, 2, 983, 1966 |
| Number of properties | 0 | 1 |
| Semiprimes | 568th | |
| Roman numberals | MCMLXV | MCMLXVI |
| Base 2 | 111101011012 | 111101011102 |
| Base 3 | 22002103 | 22002113 |
| Base 4 | 1322314 | 1322324 |
| Base 5 | 303305 | 303315 |
| Base 6 | 130336 | 130346 |
| Base 7 | 55057 | 55067 |
| Base 8 | 36558 | 36568 |
| Base 9 | 26239 | 26249 |
| Base 10 | 196510 | 196610 |
| Base 11 | 152711 | 152811 |
| Base 12 | 117912 | 117a12 |
| Base 13 | b8213 | b8313 |
| Base 14 | a0514 | a0614 |
| Base 15 | 8b015 | 8b115 |
| Base 16 | 7ad16 | 7ae16 |