Factorize 264x^3 as far as possible.

I know 81x is 3^4*x or 3*3*3*3*x now for example, but how do you get the smallest number in this case?

264 = 33 ∙ 8

8 = 2³

264 = 33 ∙ 2³

264 x³ = 33 ∙ 2³∙ x³ = 33 ( 2 x )³