√166 = 12.8840987267. 166 is not a perfect square; the result is irrational.

Is 166 a perfect square?

No, 166 is not a perfect square. Its square root is irrational.

What is 12.8840987267 squared?

12.8840987267 squared is approximately 166. (12.8840987267)² ≈ 166

Instant answer with step-by-step solution

√166 = 12.8840987267

√166 = 12.8840987267

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

We need to find √166 — a number that when multiplied by itself equals 166.
166 is not a perfect square. Its square root is irrational.
It falls between √144 = 12 and √169 = 13.
Using the formula √N = N^(1/2): √166 = 166^0.5 = 12.8840987267
Verification: 12.8840987267 × 12.8840987267 ≈ 166 ✓ (rounded to 10 significant figures)

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