In Perspective: Right Now, Apple Has More Cash On Hand Than Treasury : The Two-Way : NPR:
"As of Wednesday, the Treasury reported it had $73.768 billion cash on hand. What the Obama administration has been saying is that that number will dwindle to a point where the U.S. will not be able to pay its financial obligations, unless it's allowed to borrow more money.
$73.768 billion sounds like a lot of money, but to put it in perspective, Apple Insider points out that in its third quarter earning's report, Apple said it had $76.156 billion in cash."