Facebook has 1.32bn daily active users; Mobile is 87% of ad revenue

"Daily active users (DAUs) – DAUs were 1.32 billion on average for June 2017, an increase of 17% year-over-year.
Monthly active users (MAUs) – MAUs were 2.01 billion as of June 30, 2017, an increase of 17% year-over-year.
Mobile advertising revenue – Mobile advertising revenue represented approximately 87% of advertising revenue for the second quarter of 2017, up from approximately 84% of advertising revenue in the second quarter of 2016.
Capital expenditures – Capital expenditures for the second quarter of 2017 were $1.44 billion.
Cash and cash equivalents and marketable securities – Cash and cash equivalents and marketable securities were $35.45 billion at the end of the second quarter of 2017.
Headcount – Headcount was 20,658 as of June 30, 2017, an increase of 43% year-over-year."

Source:  Facebook's Q2 2017 Earnings, released 26th July 2017