It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 018 is not a prime number.
For example, 165 018 can be divided by 2: 165 018 / 2 = 82 509.
For 165 018 to be a prime number, it would have been required that 165 018 has only two divisors, i.e., itself and 1.
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165 018 is an even number, because it is evenly divisible by 2: 165 018 / 2 = 82 509.
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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 165 018 is about 406.224.
Thus, the square root of 165 018 is not an integer, and therefore 165 018 is not a square number.
The square of a number (here 165 018) is the result of the product of this number (165 018) by itself (i.e., 165 018 × 165 018); the square of 165 018 is sometimes called "raising 165 018 to the power 2", or "165 018 squared".
The square of 165 018 is 27 230 940 324 because 165 018 × 165 018 = 165 0182 = 27 230 940 324.
As a consequence, 165 018 is the square root of 27 230 940 324.
The multiples of 165 018 are all integers evenly divisible by 165 018, that is all numbers such that the remainder of the division by 165 018 is zero. There are infinitely many multiples of 165 018. The smallest multiples of 165 018 are: