In a press release today, Apple announced they sold over 1.7 million iPhone 4 units in the first 72 hours after launch.

I wrote a blog post a while back about getting your head around these kind of numbers.

There are 259,200 seconds in 72 hours.

That means Apple put an iPhone 4 in someone’s hand on average every 150 milliseconds for 72 hours straight. That’s six-and-a-half units per second.

That’s a lot of phones.