64 is both a perfect square and a perfect cube. It is a perfect square because (8 \times 8 = 64) and a perfect cube because (4 \times 4 \times 4 = 64).
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How about 64 which is cube and square number because 4*4*4 = 64 and 8*8 = 64
64
64. 64 = 82 = 43 26 = (23)2 = (22)3 = 64.
6443 = 6482 = 64
0, 1 and 64 are three numbers that qualify.