It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 671 is not a prime number.
For example, 165 671 can be divided by 11: 165 671 / 11 = 15 061.
For 165 671 to be a prime number, it would have been required that 165 671 has only two divisors, i.e., itself and 1.
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165 671 is an odd number, because it is not evenly divisible by 2.
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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 165 671 is about 407.027.
Thus, the square root of 165 671 is not an integer, and therefore 165 671 is not a square number.
The square of a number (here 165 671) is the result of the product of this number (165 671) by itself (i.e., 165 671 × 165 671); the square of 165 671 is sometimes called "raising 165 671 to the power 2", or "165 671 squared".
The square of 165 671 is 27 446 880 241 because 165 671 × 165 671 = 165 6712 = 27 446 880 241.
As a consequence, 165 671 is the square root of 27 446 880 241.
The multiples of 165 671 are all integers evenly divisible by 165 671, that is all numbers such that the remainder of the division by 165 671 is zero. There are infinitely many multiples of 165 671. The smallest multiples of 165 671 are: