It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 108 is not a prime number.
For example, 165 108 can be divided by 2: 165 108 / 2 = 82 554.
For 165 108 to be a prime number, it would have been required that 165 108 has only two divisors, i.e., itself and 1.
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165 108 is an even number, because it is evenly divisible by 2: 165 108 / 2 = 82 554.
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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 165 108 is about 406.335.
Thus, the square root of 165 108 is not an integer, and therefore 165 108 is not a square number.
The square of a number (here 165 108) is the result of the product of this number (165 108) by itself (i.e., 165 108 × 165 108); the square of 165 108 is sometimes called "raising 165 108 to the power 2", or "165 108 squared".
The square of 165 108 is 27 260 651 664 because 165 108 × 165 108 = 165 1082 = 27 260 651 664.
As a consequence, 165 108 is the square root of 27 260 651 664.
The multiples of 165 108 are all integers evenly divisible by 165 108, that is all numbers such that the remainder of the division by 165 108 is zero. There are infinitely many multiples of 165 108. The smallest multiples of 165 108 are: