108

Number
$108$ (one hundred and eight) is:


 * $2^2 \times 3^3$


 * The $15$th powerful number after $1, 4, 8, 9, 16, 25, 27, 32, 36, 49, 64, 72, 81, 100$


 * The number of distinct heptominoes, up to reflection.

Also see

 * 108 Heptominoes