Those sales figures equate to 16.5 million units sold. Accordingly, Take-Two believes that GTA V's sales numbers are like a lightning rod, and marks a milestone. As the fastest selling entertainment property in history. The last major release with sales numbers close to those eagles is Call of Duty: Black Ops 2. Although Black Ops 2 took 15 days to achieve that.
While GTA V has lit a fire in us all, the multiplayer mode is not available, and won't be till October 1. And as far as rumors of the day go, there's a good chance to expect a next generation and PC port of the game.
This is a testament to my friend list, and GTA V is the game %75 of them are playing right now.