So, while researching exactly what f/177 is, stopwise, I found this nifty darn PDF file with a list of the most common (and quite a few uncommon) stops, what their actual value is (instead of the nice, friendly rounded off ones we all use), and it tells you what the different shutters and apertures are typical of and used for, too. Very nice.

Check it out here, throw a copy in your camera bag, never hurts to have around.