Aug. 5: Official opening ceremony.
Aug. 4: NBC will air an Olympics preview story.
270 million: Number of TV viewers expected to watch NBC’s coverage.
$1 billion: The amount of advertising revenue NBC has already reached.
160,000: Zika cases recorded in Brazil so far.
Up to $40 million: Amount Nike was rumored to pay for its Olympic sponsorship deal.
21 and counting: Prominent athletes who have pulled out of the 2016 Rio Olympics. Not all have cited Zika as a factor.
7.5 million: Tickets available for purchase to the 2016 Rio Games.
206: Nations participating.
306: Events in 28 sports.
10,500: Athletes expected to participate.