√664 = 25.7681974535. 664 is not a perfect square; the result is irrational.

Is 664 a perfect square?

No, 664 is not a perfect square. Its square root is irrational.

What is 25.7681974535 squared?

25.7681974535 squared is approximately 664. (25.7681974535)² ≈ 664

Instant answer with step-by-step solution

√664 = 25.7681974535

√664 = 25.7681974535

⚠ 664 is not a perfect square — result rounded to 10 significant figures

We need to find √664 — a number that when multiplied by itself equals 664.
664 is not a perfect square. Its square root is irrational.
It falls between √625 = 25 and √676 = 26.
Using the formula √N = N^(1/2): √664 = 664^0.5 = 25.7681974535
Verification: 25.7681974535 × 25.7681974535 ≈ 664 ✓ (rounded to 10 significant figures)

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