Columbia will be a reach for most everyone, but if you can secure glowing recommendations and show yourself through your essays, you’ll drastically improve your chances.
I wish you the best of luck - Early Decision is a big commitment. Do you have any hooks (Legacy, First Gen, Sports, etc.)? Try retaking the SAT WH exam - they curve it heavily, so you should be able to get a 700 if you study a bit 
EDIT: Here’s mine - http://talk.collegeconfidential.com/what-my-chances/1825819-for-my-list-extensive.html#latest