It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 166 004 is not a prime number.
For example, 42 166 004 can be divided by 2: 42 166 004 / 2 = 21 083 002.
For 42 166 004 to be a prime number, it would have been required that 42 166 004 has only two divisors, i.e., itself and 1.
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42 166 004 is an even number, because it is evenly divisible by 2: 42 166 004 / 2 = 21 083 002.
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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 42 166 004 is about 6 493.536.
Thus, the square root of 42 166 004 is not an integer, and therefore 42 166 004 is not a square number.
The square of a number (here 42 166 004) is the result of the product of this number (42 166 004) by itself (i.e., 42 166 004 × 42 166 004); the square of 42 166 004 is sometimes called "raising 42 166 004 to the power 2", or "42 166 004 squared".
The square of 42 166 004 is 1 777 971 893 328 016 because 42 166 004 × 42 166 004 = 42 166 0042 = 1 777 971 893 328 016.
As a consequence, 42 166 004 is the square root of 1 777 971 893 328 016.
42 166 004 is a number with 8 digits.
The multiples of 42 166 004 are all integers evenly divisible by 42 166 004, that is all numbers such that the remainder of the division by 42 166 004 is zero. There are infinitely many multiples of 42 166 004. The smallest multiples of 42 166 004 are: