Hi and sorry about the typo. I would not worry too much about it despite being materially different. We have had people submit their annual salary instead of monthly and vice versa on the applications. All things happen and typos/issues often happen and not even caught by applicants.
I don't think it will hurt to report it but I don't know that it will make a difference. I don't really think that schools have a good mechanism of recording and updating things - they would have to update your whole resume in the file. Someone on the staff will be like - Really? This gal/dude typed 62 instead of 26 and now I have to find them, open their file, locate the correct section, update the numbers and save it?
P.S.
Having spent 20 mins writing this reply with on and off interruptions, thus giving me time to reflect on it, if I were in your shoes, I would probably contact the school just for the peace of mind but that is me. Let's see if you get better advice.