First, there is no such thing as a typical “book.” Books can be any length at all. Period.
For marketing reasons and the expectations of the audience, certain specific genres or sub-genres may have expected ranges of word counts. Epic fantasy tends to run very long, often 200,000 words. Romance novels tend to run short, around 80,000 words. Bestsellers are almost always long, because people feel they are getting a better deal with a heftier book.
Word counts and page lengths are almost wholly separate concepts. Hardbacks (and trade paperbacks, which are normally printed off the same base as a hardback) tend to use larger typefaces and more leading (the space between lines). Paperbacks can get away with smaller fonts and less leading because they aren’t as wide, giving the eye less time to get lost moving across the line. Paperbacks are extremely manipulable. You can find anywhere from 350 to 500 words on a normal paperback page, depending on the publisher’s intent. There are outliers in both directions, of course, but these are rare because they are literally harder to read.
Note that even this is far more than appears on any standard manuscript page. But that’s because manuscripts have little or nothing to do with the final copy.
When writers talk about writing a certain number of pages a day, they mean it uniformly and without exception to my knowledge as a way of internal pressure to put words on paper. The number of words is meaningless. They’ve just found that the mental discipline of forcing themselves to write, to write everyday, and to not wait for creativity to strike is their best way of coping with the difficulties of writing in the first place. Frederik Pohl used to write four pages a day. Other writers have said that they write one page a day. The important part of that clause is “a day,” not the number.