The square root of 665 calculated to 10 decimal places.
| Number | Square Root | Perfect Square? |
|---|---|---|
| 660 | 25.6904651573 | No |
| 661 | 25.7099202644 | No |
| 662 | 25.7293606605 | No |
| 663 | 25.7487863792 | No |
| 664 | 25.7681974535 | No |
| 665 | 25.7875939165 | No |
| 666 | 25.8069758011 | No |
| 667 | 25.8263431403 | No |
| 668 | 25.8456959666 | No |
| 669 | 25.8650343128 | No |
| 670 | 25.8843582111 | No |
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