It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 630 664 is not a prime number.
For example, 630 664 can be divided by 2: 630 664 / 2 = 315 332.
For 630 664 to be a prime number, it would have been required that 630 664 has only two divisors, i.e., itself and 1.
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630 664 is an even number, because it is evenly divisible by 2: 630 664 / 2 = 315 332.
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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 630 664 is about 794.144.
Thus, the square root of 630 664 is not an integer, and therefore 630 664 is not a square number.
The square of a number (here 630 664) is the result of the product of this number (630 664) by itself (i.e., 630 664 × 630 664); the square of 630 664 is sometimes called "raising 630 664 to the power 2", or "630 664 squared".
The square of 630 664 is 397 737 080 896 because 630 664 × 630 664 = 630 6642 = 397 737 080 896.
As a consequence, 630 664 is the square root of 397 737 080 896.
The multiples of 630 664 are all integers evenly divisible by 630 664, that is all numbers such that the remainder of the division by 630 664 is zero. There are infinitely many multiples of 630 664. The smallest multiples of 630 664 are: