A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6672750 can be evenly divided by 1 2 3 5 6 7 10 14 15 21 25 30 31 35 41 42 50 62 70 75 82 93 105 123 125 150 155 175 186 205 210 217 246 250 287 310 350 375 410 434 465 525 574 615 651 750 775 861 875 930 1,025 1,050 1,085 1,230 1,271 1,302 1,435 1,550 1,722 1,750 2,050 2,170 2,325 2,542 2,625 2,870 3,075 3,255 3,813 3,875 4,305 4,650 5,125 5,250 5,425 6,150 6,355 6,510 7,175 7,626 7,750 8,610 8,897 10,250 10,850 11,625 12,710 14,350 15,375 16,275 17,794 19,065 21,525 23,250 26,691 27,125 30,750 31,775 32,550 35,875 38,130 43,050 44,485 53,382 54,250 63,550 71,750 81,375 88,970 95,325 107,625 133,455 158,875 162,750 190,650 215,250 222,425 266,910 317,750 444,850 476,625 667,275 953,250 1,112,125 1,334,550 2,224,250 3,336,375 and 6,672,750, with no remainder.
Since 6,672,750 cannot be divided by just 1 and 6,672,750, it is not a prime number.