3^3 = 27
27^2 = 729
(3^3)^2 = 3^6 = 729
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The sum of the first n cubed numbers is the square of the nth triangular number.
The sum of the first n cubed numbers is: [n*(n+1)/2]2 which is the same as the square of the sum of the first n numbers.
They are the sixth powers of all integers.
9, 16, and 25 are square numbers.
A number can't be cubed and prime. Cubed numbers (other than 1) have more than two factors.