In this task you will be given a list of numbers. You should remove any number that is not an integer (whole number). If every number is not an whole number then an empty list ("[]") should be returned. Otherwise, answer with the list of whole numbers separated by comma inside brackets.
[-5.472, -39.743, -23, -46, -81, 52, 75, 81.415, -20.075, -18.249, 66.324]