It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 264 678 is not a prime number.
For example, 264 678 can be divided by 2: 264 678 / 2 = 132 339.
For 264 678 to be a prime number, it would have been required that 264 678 has only two divisors, i.e., itself and 1.
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264 678 is an even number, because it is evenly divisible by 2: 264 678 / 2 = 132 339.
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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 264 678 is about 514.469.
Thus, the square root of 264 678 is not an integer, and therefore 264 678 is not a square number.
The square of a number (here 264 678) is the result of the product of this number (264 678) by itself (i.e., 264 678 × 264 678); the square of 264 678 is sometimes called "raising 264 678 to the power 2", or "264 678 squared".
The square of 264 678 is 70 054 443 684 because 264 678 × 264 678 = 264 6782 = 70 054 443 684.
As a consequence, 264 678 is the square root of 70 054 443 684.
The multiples of 264 678 are all integers evenly divisible by 264 678, that is all numbers such that the remainder of the division by 264 678 is zero. There are infinitely many multiples of 264 678. The smallest multiples of 264 678 are: