It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 133 664 is not a prime number.
For example, 133 664 can be divided by 2: 133 664 / 2 = 66 832.
For 133 664 to be a prime number, it would have been required that 133 664 has only two divisors, i.e., itself and 1.
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133 664 is an even number, because it is evenly divisible by 2: 133 664 / 2 = 66 832.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 133 664 is about 365.601.
Thus, the square root of 133 664 is not an integer, and therefore 133 664 is not a square number.
The square of a number (here 133 664) is the result of the product of this number (133 664) by itself (i.e., 133 664 × 133 664); the square of 133 664 is sometimes called "raising 133 664 to the power 2", or "133 664 squared".
The square of 133 664 is 17 866 064 896 because 133 664 × 133 664 = 133 6642 = 17 866 064 896.
As a consequence, 133 664 is the square root of 17 866 064 896.
The multiples of 133 664 are all integers evenly divisible by 133 664, that is all numbers such that the remainder of the division by 133 664 is zero. There are infinitely many multiples of 133 664. The smallest multiples of 133 664 are: