My fiance's passport accidentally went through the washer and he had to replace it since it had water damage. His new passport just came in today and it has a new number. Does he need to update his number with any department?
You will use the new passport # when you fill out the DS-160. No other place needs updating. You already have NOA2.
If you already completed DS-160 and submitted he will just update at interview taking both old and new passport to interview.