It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 664 464 is not a prime number.
For example, 664 464 can be divided by 2: 664 464 / 2 = 332 232.
For 664 464 to be a prime number, it would have been required that 664 464 has only two divisors, i.e., itself and 1.
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664 464 is an even number, because it is evenly divisible by 2: 664 464 / 2 = 332 232.
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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 664 464 is about 815.147.
Thus, the square root of 664 464 is not an integer, and therefore 664 464 is not a square number.
The square of a number (here 664 464) is the result of the product of this number (664 464) by itself (i.e., 664 464 × 664 464); the square of 664 464 is sometimes called "raising 664 464 to the power 2", or "664 464 squared".
The square of 664 464 is 441 512 407 296 because 664 464 × 664 464 = 664 4642 = 441 512 407 296.
As a consequence, 664 464 is the square root of 441 512 407 296.
The multiples of 664 464 are all integers evenly divisible by 664 464, that is all numbers such that the remainder of the division by 664 464 is zero. There are infinitely many multiples of 664 464. The smallest multiples of 664 464 are: