A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7006440 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 19 20 21 24 28 30 35 38 40 42 56 57 60 70 76 84 95 105 114 120 133 140 152 168 190 210 228 266 280 285 380 399 420 439 456 532 570 665 760 798 840 878 1,064 1,140 1,317 1,330 1,596 1,756 1,995 2,195 2,280 2,634 2,660 3,073 3,192 3,512 3,990 4,390 5,268 5,320 6,146 6,585 7,980 8,341 8,780 9,219 10,536 12,292 13,170 15,365 15,960 16,682 17,560 18,438 24,584 25,023 26,340 30,730 33,364 36,876 41,705 46,095 50,046 52,680 58,387 61,460 66,728 73,752 83,410 92,190 100,092 116,774 122,920 125,115 166,820 175,161 184,380 200,184 233,548 250,230 291,935 333,640 350,322 368,760 467,096 500,460 583,870 700,644 875,805 1,000,920 1,167,740 1,401,288 1,751,610 2,335,480 3,503,220 and 7,006,440, with no remainder.
Since 7,006,440 cannot be divided by just 1 and 7,006,440, it is not a prime number.