It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 682 016 is not a prime number.
For example, 682 016 can be divided by 2: 682 016 / 2 = 341 008.
For 682 016 to be a prime number, it would have been required that 682 016 has only two divisors, i.e., itself and 1.
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682 016 is an even number, because it is evenly divisible by 2: 682 016 / 2 = 341 008.
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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 682 016 is about 825.843.
Thus, the square root of 682 016 is not an integer, and therefore 682 016 is not a square number.
The square of a number (here 682 016) is the result of the product of this number (682 016) by itself (i.e., 682 016 × 682 016); the square of 682 016 is sometimes called "raising 682 016 to the power 2", or "682 016 squared".
The square of 682 016 is 465 145 824 256 because 682 016 × 682 016 = 682 0162 = 465 145 824 256.
As a consequence, 682 016 is the square root of 465 145 824 256.
The multiples of 682 016 are all integers evenly divisible by 682 016, that is all numbers such that the remainder of the division by 682 016 is zero. There are infinitely many multiples of 682 016. The smallest multiples of 682 016 are: