Answer:
1,296
Explanation:
The answer is 1,296 because the numbers are going in the order of powers:
6^1 = 6
6^2 = 36
6^3 = 216
6^5 = 7,776
6^6 = 46,656
The power that is missing is 6 to the 4th power, which, when calculated, would be 1,296.
So, the answer would be 1,296