It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 166 674 066 is not a prime number.
For example, 166 674 066 can be divided by 2: 166 674 066 / 2 = 83 337 033.
For 166 674 066 to be a prime number, it would have been required that 166 674 066 has only two divisors, i.e., itself and 1.
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166 674 066 is an even number, because it is evenly divisible by 2: 166 674 066 / 2 = 83 337 033.
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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 166 674 066 is about 12 910.231.
Thus, the square root of 166 674 066 is not an integer, and therefore 166 674 066 is not a square number.
The square of a number (here 166 674 066) is the result of the product of this number (166 674 066) by itself (i.e., 166 674 066 × 166 674 066); the square of 166 674 066 is sometimes called "raising 166 674 066 to the power 2", or "166 674 066 squared".
The square of 166 674 066 is 27 780 244 276 972 356 because 166 674 066 × 166 674 066 = 166 674 0662 = 27 780 244 276 972 356.
As a consequence, 166 674 066 is the square root of 27 780 244 276 972 356.
166 674 066 is a number with 9 digits.
The multiples of 166 674 066 are all integers evenly divisible by 166 674 066, that is all numbers such that the remainder of the division by 166 674 066 is zero. There are infinitely many multiples of 166 674 066. The smallest multiples of 166 674 066 are: