It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 264 648 is not a prime number.
For example, 264 648 can be divided by 2: 264 648 / 2 = 132 324.
For 264 648 to be a prime number, it would have been required that 264 648 has only two divisors, i.e., itself and 1.
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264 648 is an even number, because it is evenly divisible by 2: 264 648 / 2 = 132 324.
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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 264 648 is about 514.440.
Thus, the square root of 264 648 is not an integer, and therefore 264 648 is not a square number.
The square of a number (here 264 648) is the result of the product of this number (264 648) by itself (i.e., 264 648 × 264 648); the square of 264 648 is sometimes called "raising 264 648 to the power 2", or "264 648 squared".
The square of 264 648 is 70 038 563 904 because 264 648 × 264 648 = 264 6482 = 70 038 563 904.
As a consequence, 264 648 is the square root of 70 038 563 904.
The multiples of 264 648 are all integers evenly divisible by 264 648, that is all numbers such that the remainder of the division by 264 648 is zero. There are infinitely many multiples of 264 648. The smallest multiples of 264 648 are: