A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7096740 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 60 61 70 84 105 122 140 183 210 244 277 305 366 420 427 554 610 732 831 854 915 1,108 1,220 1,281 1,385 1,662 1,708 1,830 1,939 2,135 2,562 2,770 3,324 3,660 3,878 4,155 4,270 5,124 5,540 5,817 6,405 7,756 8,310 8,540 9,695 11,634 12,810 16,620 16,897 19,390 23,268 25,620 29,085 33,794 38,780 50,691 58,170 67,588 84,485 101,382 116,340 118,279 168,970 202,764 236,558 253,455 337,940 354,837 473,116 506,910 591,395 709,674 1,013,820 1,182,790 1,419,348 1,774,185 2,365,580 3,548,370 and 7,096,740, with no remainder.
Since 7,096,740 cannot be divided by just 1 and 7,096,740, it is not a prime number.