It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 007 668 is not a prime number.
For example, 42 007 668 can be divided by 2: 42 007 668 / 2 = 21 003 834.
For 42 007 668 to be a prime number, it would have been required that 42 007 668 has only two divisors, i.e., itself and 1.
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42 007 668 is an even number, because it is evenly divisible by 2: 42 007 668 / 2 = 21 003 834.
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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 42 007 668 is about 6 481.332.
Thus, the square root of 42 007 668 is not an integer, and therefore 42 007 668 is not a square number.
The square of a number (here 42 007 668) is the result of the product of this number (42 007 668) by itself (i.e., 42 007 668 × 42 007 668); the square of 42 007 668 is sometimes called "raising 42 007 668 to the power 2", or "42 007 668 squared".
The square of 42 007 668 is 1 764 644 170 798 224 because 42 007 668 × 42 007 668 = 42 007 6682 = 1 764 644 170 798 224.
As a consequence, 42 007 668 is the square root of 1 764 644 170 798 224.
42 007 668 is a number with 8 digits.
The multiples of 42 007 668 are all integers evenly divisible by 42 007 668, that is all numbers such that the remainder of the division by 42 007 668 is zero. There are infinitely many multiples of 42 007 668. The smallest multiples of 42 007 668 are: