It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 1 366 037 is not a prime number.
For example, 1 366 037 can be divided by 331: 1 366 037 / 331 = 4 127.
For 1 366 037 to be a prime number, it would have been required that 1 366 037 has only two divisors, i.e., itself and 1.
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1 366 037 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 1 366 037 is about 1 168.776.
Thus, the square root of 1 366 037 is not an integer, and therefore 1 366 037 is not a square number.
The square of a number (here 1 366 037) is the result of the product of this number (1 366 037) by itself (i.e., 1 366 037 × 1 366 037); the square of 1 366 037 is sometimes called "raising 1 366 037 to the power 2", or "1 366 037 squared".
The square of 1 366 037 is 1 866 057 085 369 because 1 366 037 × 1 366 037 = 1 366 0372 = 1 866 057 085 369.
As a consequence, 1 366 037 is the square root of 1 866 057 085 369.
The multiples of 1 366 037 are all integers evenly divisible by 1 366 037, that is all numbers such that the remainder of the division by 1 366 037 is zero. There are infinitely many multiples of 1 366 037. The smallest multiples of 1 366 037 are: