I just don't know what number it is because I'm not that familiar with the Village. You might find it here:
http://www.mta.nyc.ny.us/nyct/general/
You can also call NYC transit directly and they can tell you how to get there:
(718) 330-1234
In all honesty, if you can afford it (at least coming home) I'd go for a cab. It's less confusion and probably safer than trying to find your way around the city at night. But, then again, you might make friends at NOTS who will accompany you? You never know.