64 BG RAM, Win 7 & Pagefile size

OK, got my computer back. I see a 50 gig hiberfil.sys file and a 66 gig pagefile.sys even after turning off hibernation and rebooting.

  1. Can I delete these files?

  2. What is a hiberfil.sys file?

I feel that 66 gigs for a pageile is too large. I will not have room to install all my other software.