It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 166 042 is not a prime number.
For example, 166 042 can be divided by 2: 166 042 / 2 = 83 021.
For 166 042 to be a prime number, it would have been required that 166 042 has only two divisors, i.e., itself and 1.
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166 042 is an even number, because it is evenly divisible by 2: 166 042 / 2 = 83 021.
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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 166 042 is about 407.483.
Thus, the square root of 166 042 is not an integer, and therefore 166 042 is not a square number.
The square of a number (here 166 042) is the result of the product of this number (166 042) by itself (i.e., 166 042 × 166 042); the square of 166 042 is sometimes called "raising 166 042 to the power 2", or "166 042 squared".
The square of 166 042 is 27 569 945 764 because 166 042 × 166 042 = 166 0422 = 27 569 945 764.
As a consequence, 166 042 is the square root of 27 569 945 764.
The multiples of 166 042 are all integers evenly divisible by 166 042, that is all numbers such that the remainder of the division by 166 042 is zero. There are infinitely many multiples of 166 042. The smallest multiples of 166 042 are: