The folowing table expresses '668' 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 | 1010011100 | 101 | 10 | 1 | ||||||
| 3 | 220202 | 22,11 | 2 | |||||||
| 4 | 22130 | 20 | 2 | |||||||
| 5 | 10133 | 13 | 4 | |||||||
| 6 | 3032 | 12 | 3 | |||||||
| 7 | 1643 | 20 | 2 | |||||||
| 8 | 1234 | 12 | 3 | |||||||
| 9 | 822 | 13 | 4 | |||||||
| 10 | 668 | 20 | 2 | |||||||
| 11 | 558 | 17 | 8 | |||||||
| 12 | 478 | 17 | 8 | |||||||
| 13 | 3C5 | 17 | 8 | |||||||
| 14 | 35A | 14 | 5 | |||||||
| 15 | 2E8 | 19 | A | |||||||
| 16 | 29C | 17 | 8 |
Factors: 22 * 167