It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 996 is not a prime number.
For example, 165 996 can be divided by 2: 165 996 / 2 = 82 998.
For 165 996 to be a prime number, it would have been required that 165 996 has only two divisors, i.e., itself and 1.
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165 996 is an even number, because it is evenly divisible by 2: 165 996 / 2 = 82 998.
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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 165 996 is about 407.426.
Thus, the square root of 165 996 is not an integer, and therefore 165 996 is not a square number.
The square of a number (here 165 996) is the result of the product of this number (165 996) by itself (i.e., 165 996 × 165 996); the square of 165 996 is sometimes called "raising 165 996 to the power 2", or "165 996 squared".
The square of 165 996 is 27 554 672 016 because 165 996 × 165 996 = 165 9962 = 27 554 672 016.
As a consequence, 165 996 is the square root of 27 554 672 016.
The multiples of 165 996 are all integers evenly divisible by 165 996, that is all numbers such that the remainder of the division by 165 996 is zero. There are infinitely many multiples of 165 996. The smallest multiples of 165 996 are: