It is not a square of an integer. However, it is the square of a number which is approx 25.6125.
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25.6125
That's an even number.
656 = 656/1 in fraction
656 is an integer, not a fraction. There is not really a sensible way of writing it as a fraction or mixed number. However, if you must, you can use (656*k)/k where k is any non-zero integer.
A number squared means that the number is multiplied by itself.