How many Achievements?

[Duuude007]

Currently it's somewhere around 657 or 658.

That is not a fixed value, its just the highest sum amount achieved so far.

The next new candidates to be viable achievements (apart from new content) are:

100,000 gil from a single leve ( was possible until gil rewards were nerfed.)
200,000 monster kills
5,000 regional leves completed (a handful of presumed RMT have this as of March...even 10k lol)
2000 local leves completed

and so on... and so on.