The square root of 661 calculated to 10 decimal places.
| Number | Square Root | Perfect Square? |
|---|---|---|
| 656 | 25.6124969497 | No |
| 657 | 25.6320112360 | No |
| 658 | 25.6515106768 | No |
| 659 | 25.6709953060 | No |
| 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 |
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