The folowing table expresses '667' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1010011011 | 110 | 10 | 1 | ||||||
| 3 | 220201 | 21,10 | 1 | |||||||
| 4 | 22123 | 22,10 | 1 | |||||||
| 5 | 10132 | 12 | 3 | |||||||
| 6 | 3031 | 11 | 2 | |||||||
| 7 | 1642 | 16,10 | 1 | |||||||
| 8 | 1233 | 11 | 2 | |||||||
| 9 | 821 | 12 | 3 | |||||||
| 10 | 667 | 19,10 | 1 | |||||||
| 11 | 557 | 16 | 7 | |||||||
| 12 | 477 | 16 | 7 | |||||||
| 13 | 3C4 | 16 | 7 | |||||||
| 14 | 359 | 13 | 4 | |||||||
| 15 | 2E7 | 18 | 9 | |||||||
| 16 | 29B | 16 | 7 |
Factors: 23 * 29
667 is in the Pythagorean Triple: (156, 667, 685).