60

.

As it is an even number, it must end with 2, 4 or 6.

Taking XX2 there are five combinations for the first digit (1X2, 3X2, 4X2, 6X2, 7X2).

Each digit has 4 combinations (for 1X2, these are 132, 142, 162, 172).

So there are 4 * 5 = 20 combinations for XX2.

XX4 and XX6 have the same amount of combinations, so the total combinations is 3 * 20 = 60.