Nah...check lawschoolnumbers.com, penn...you're absolutely right...that 166 will be kind of a hindrance with those schools, it looks like.
If I were you, I wouldn't retake unless I really felt that I could improve. So...you might want to spend some time prepping again and seeing if you can get that 166 up to, at least, a 170 (personally, I think your average of those two scores if you retake needs to come out 170 because, particularly, Columbia and NYU seem to be favoring students who score in the 170s this year, regardless of GPA and undergrad). If you really want to go to those schools, I'd try everything I could...though Penn might give you the benefit of the doubt as you come from the undergrad school...but you can't bank on that.