A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5576850 can be evenly divided by 1 2 3 5 6 9 10 15 17 18 25 27 30 34 45 50 51 54 75 81 85 90 102 135 150 153 162 170 225 243 255 270 306 405 425 450 459 486 510 675 729 765 810 850 918 1,215 1,275 1,350 1,377 1,458 1,530 2,025 2,187 2,295 2,430 2,550 2,754 3,645 3,825 4,050 4,131 4,374 4,590 6,075 6,561 6,885 7,290 7,650 8,262 10,935 11,475 12,150 12,393 13,122 13,770 18,225 20,655 21,870 22,950 24,786 32,805 34,425 36,450 37,179 41,310 54,675 61,965 65,610 68,850 74,358 103,275 109,350 111,537 123,930 164,025 185,895 206,550 223,074 309,825 328,050 371,790 557,685 619,650 929,475 1,115,370 1,858,950 2,788,425 and 5,576,850, with no remainder.
Since 5,576,850 cannot be divided by just 1 and 5,576,850, it is not a prime number.