# What is the square root of 666

The short answer is $$\sqrt{ 666 } = 25.806975801128$$.

If that's all you're looking for, thanks for coming by. But if you're interested in the hows and whys behind square roots, continue reading and we'll tell you all about the square root of 666.

## 666 is not a perfect square

Let's look at some math

$$\LARGE \sqrt{ 666 } = 25.806975801128$$

Note that $$25.806975801128$$ is not a whole number, therefore 666 is not a perfect square.

The next perfect square greater than 666 is 676. The previous perfect square less than 666 is 625.

## Square root of 666 as an exponent

Any square root can be converted to a number with a fractional exponent. In the case of 666 the following two values are equal.

$$\LARGE \sqrt{ 666 } = 666^{^1/_2}$$

## Square root of 666 as a fraction

Since 666 is not a perfect square, sometimes we might want to get a fractional estimate of the square root value. In the case of 666 that value is $$\Large 25 \frac{21}{26}$$.

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