sexplex it is 69 zeros after it.
Yes it is a number. A monkeyplex has 66 zero's behind it.
No definition can be found on line for "monkeyplex", which leads us to suspect that the question is posed whimsically, and borders on abuse of WikiAnswers.
That would be a Monkeyplex, or, in scientific notation, it would be explained as 10 to the 66th power