Bluebulb Projects' The Measure of Things presents:
810 is about 0.0000006 times the number of Users on Facebook.
In other words, it's 0.0000005630 times the count of Users on Facebook, and the count of Users on Facebook is 1,780,000 times that amount.
(March, 2015 figures) (monthly active users)
Facebook had 1.44 billion active users for the month ending March, 2015. In August, 2014, Facebook began a process of removing 87 million accounts that it had found to be fake.