Square Root Calculator › Square root of 664
Square Root of 664
√664 ≈ 25.768197
664 is not a perfect square, so √664 is an irrational number that is approximately 25.768197. In simplified radical form, √664 = 2√166.
√664 lies between √625 = 25 and √676 = 26.
| Number | 664 |
| Square root (decimal) | 25.768197 |
| Simplified radical | 2√166 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 664 a perfect square?
No, 664 is not a perfect square, so its square root is irrational and approximately 25.768197.
What is the square root of 664 in simplest radical form?
√664 = 2√166 in simplest radical form.