The AMZN PE band begins at 450K, so this a very good offer, if they match. Congrats! Looks like a choice between IC and mgmt that you need to make. If IC is what you want, PE at Amazon is a very well respected role.
Seriously. What the hell - how do you get to 650k TC? That seems pretty far out of band for Fb/Goog L6/M1. Maybe you're doing the math different than everyone but a good offer is more like just over 500k TC.