Square Root Calculator › Square root of 66
Square Root of 66
√66 ≈ 8.124038
66 is not a perfect square, so √66 is an irrational number that is approximately 8.124038. In simplified radical form, √66 = √66.
√66 lies between √64 = 8 and √81 = 9.
| Number | 66 |
| Square root (decimal) | 8.124038 |
| Simplified radical | √66 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 66 a perfect square?
No, 66 is not a perfect square, so its square root is irrational and approximately 8.124038.
What is the square root of 66 in simplest radical form?
√66 = √66 in simplest radical form.