If all of the pages are very valuable and serve the user you should be OK. But if Google finds too many people clicked a search result to your page, and then quickly bounced back to Google and clicked a different result from the search listings, they'll trust your site less and lower your rankings across the board.
The problem isn't too many pages, it's too many pages that aren't satisfying enough of Google's users.
In February 2011 Google launched "Panda" whose main intent was to find sites that were creating many low quality pages. Since then, the "content farm" strategy of quickly creating many pages has generally been backfiring.
Instead focus on pages that will satisfy Google's users, and preferably also attract social shares and links.
