A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7633470 can be evenly divided by 1 2 3 5 6 10 13 15 23 26 30 37 39 46 65 69 74 78 111 115 130 138 185 195 222 230 299 345 370 390 481 529 555 598 690 851 897 962 1,058 1,110 1,443 1,495 1,587 1,702 1,794 2,405 2,553 2,645 2,886 2,990 3,174 4,255 4,485 4,810 5,106 5,290 6,877 7,215 7,935 8,510 8,970 11,063 12,765 13,754 14,430 15,870 19,573 20,631 22,126 25,530 33,189 34,385 39,146 41,262 55,315 58,719 66,378 68,770 97,865 103,155 110,630 117,438 165,945 195,730 206,310 254,449 293,595 331,890 508,898 587,190 763,347 1,272,245 1,526,694 2,544,490 3,816,735 and 7,633,470, with no remainder.
Since 7,633,470 cannot be divided by just 1 and 7,633,470, it is not a prime number.