6

This number is a composite.

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6 is the smallest composite number whose prime factors contain distinct digits exactly once each:
The finite sequence of such numbers start as 6, 10, 14, 15, 21, 26, 30, 34, 35, 38, 42, 51, 57, 62, 65, 70, 74, 82, 85, 86, 87, 91, 94, 95, 102, 105, 106, 114, 115, 118, 122, 123, 130, 133, 134, 141, 142, 145, 146, 155, 158, 161, 166, 170, 177, 178, 182, 183, 185, 190, 194, 201, 203, 205, 206, 210, 213, 214, 215, 217, 218, 235, 237, 246, 255, 266, 267, 274, 278, 282, 285, 287, 291, 298, 301, 305, 310, 314, 321, 326, 327, 334, 335, 346, 354, 355, 358, 365, 366, 370, 371, 377, 381, 386, 391, 394, 395, 399, 402, 410, 413, 415, 426, 427, 430, 434, 435, 437, 445, 447, 455, 470, 471, 474, 485, 493, 501, 510, 515, 534, 535, 537, 545, 570, 574, 581, 582, 591, 602, 609, 610, 611, 614, 615, 623, 634, 635, 642, 654, 665, 670, 685, 694, 695, 698, 703, 705, 710, 718, 721, 723, 730, 731, 734, 742, 745, 753, 758, 763, 767, 771, 778, 790, 794, 798, 802, 805, 807, 813, 815, 817, 818, 826, 830, 835, 838, 843, 854, 861, 862, 865, 871, 878, 890, 893, 894, 895, 899, 901, 910, 914, 915, 922, 926, 934, 942, 943, 958, 965, 970, 973, 974, 982, 985, 1002, ..., with 8439563243 being the largest. How many terms are there? [Honaker]