TIL that there were 1752 books in Newton’s personal library after his death. (1763 if being included titles of which Newton owned more than one copy). Here's a category breakdown: Theology (477), Alchemy (169), Mathematics (126), Physics (52), Astronomy (33).
https://www.newtonproject.ox.ac.uk/his-library/books-in-newtons-library
https://www.reddit.com/r/todayilearned/comments/156vf7m/til_that_there_were_1752_books_in_newtons/