9x9x8x7x6x5x4x3
=1632960
763920
757
24
500
With repeated digits, 43 = 64 Without repeated digits, 4*3*2 = 24
1 set
The answer will depend on how many digits you have at your disposal. Working with the 10 digits, and barring leading zeros, there are 8,877,690 numbers.
162
1
6*6*3 = 108 numbers.
36
3x3x3=27