A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5597064 can be evenly divided by 1 2 3 4 6 8 9 11 12 18 22 24 33 36 37 44 66 72 74 88 99 111 132 148 191 198 222 264 296 333 382 396 407 444 573 666 764 792 814 888 1,146 1,221 1,332 1,528 1,628 1,719 2,101 2,292 2,442 2,664 3,256 3,438 3,663 4,202 4,584 4,884 6,303 6,876 7,067 7,326 8,404 9,768 12,606 13,752 14,134 14,652 16,808 18,909 21,201 25,212 28,268 29,304 37,818 42,402 50,424 56,536 63,603 75,636 77,737 84,804 127,206 151,272 155,474 169,608 233,211 254,412 310,948 466,422 508,824 621,896 699,633 932,844 1,399,266 1,865,688 2,798,532 and 5,597,064, with no remainder.
Since 5,597,064 cannot be divided by just 1 and 5,597,064, it is not a prime number.