It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 264 216 is not a prime number.
For example, 264 216 can be divided by 2: 264 216 / 2 = 132 108.
For 264 216 to be a prime number, it would have been required that 264 216 has only two divisors, i.e., itself and 1.
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264 216 is an even number, because it is evenly divisible by 2: 264 216 / 2 = 132 108.
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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 264 216 is about 514.019.
Thus, the square root of 264 216 is not an integer, and therefore 264 216 is not a square number.
The square of a number (here 264 216) is the result of the product of this number (264 216) by itself (i.e., 264 216 × 264 216); the square of 264 216 is sometimes called "raising 264 216 to the power 2", or "264 216 squared".
The square of 264 216 is 69 810 094 656 because 264 216 × 264 216 = 264 2162 = 69 810 094 656.
As a consequence, 264 216 is the square root of 69 810 094 656.
The multiples of 264 216 are all integers evenly divisible by 264 216, that is all numbers such that the remainder of the division by 264 216 is zero. There are infinitely many multiples of 264 216. The smallest multiples of 264 216 are: