It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 166 264 609 is not a prime number.
For example, 166 264 609 can be divided by 7: 166 264 609 / 7 = 23 752 087.
For 166 264 609 to be a prime number, it would have been required that 166 264 609 has only two divisors, i.e., itself and 1.
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166 264 609 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 166 264 609 is about 12 894.363.
Thus, the square root of 166 264 609 is not an integer, and therefore 166 264 609 is not a square number.
The square of a number (here 166 264 609) is the result of the product of this number (166 264 609) by itself (i.e., 166 264 609 × 166 264 609); the square of 166 264 609 is sometimes called "raising 166 264 609 to the power 2", or "166 264 609 squared".
The square of 166 264 609 is 27 643 920 205 922 880 because 166 264 609 × 166 264 609 = 166 264 6092 = 27 643 920 205 922 880.
As a consequence, 166 264 609 is the square root of 27 643 920 205 922 880.
166 264 609 is a number with 9 digits.
The multiples of 166 264 609 are all integers evenly divisible by 166 264 609, that is all numbers such that the remainder of the division by 166 264 609 is zero. There are infinitely many multiples of 166 264 609. The smallest multiples of 166 264 609 are: