It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 638 007 is not a prime number.
For example, 165 638 007 can be divided by 3: 165 638 007 / 3 = 55 212 669.
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For 165 638 007 to be a prime number, it would have been required that 165 638 007 has only two divisors, i.e., itself and 1.
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165 638 007 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 165 638 007 is about 12 870.043.
Thus, the square root of 165 638 007 is not an integer, and therefore 165 638 007 is not a square number.
The square of a number (here 165 638 007) is the result of the product of this number (165 638 007) by itself (i.e., 165 638 007 × 165 638 007); the square of 165 638 007 is sometimes called "raising 165 638 007 to the power 2", or "165 638 007 squared".
The square of 165 638 007 is 27 435 949 362 932 048 because 165 638 007 × 165 638 007 = 165 638 0072 = 27 435 949 362 932 048.
As a consequence, 165 638 007 is the square root of 27 435 949 362 932 048.
165 638 007 is a number with 9 digits.
The multiples of 165 638 007 are all integers evenly divisible by 165 638 007, that is all numbers such that the remainder of the division by 165 638 007 is zero. There are infinitely many multiples of 165 638 007. The smallest multiples of 165 638 007 are: