How Large is the US Federal Debt?

It's very interesting facts to share though it's been realised for long time for certain people. I excerpt it form Mike Hewitt imagination..! (but a true fact indeed)

At the time of writing this article (3rd December 2008), the current US Federal Debt stands at $10.7 trillion. The sheer magnitude of that figure is difficult to comprehend.
In order to illustrate just how large that number is, consider the following...

The size of a dollar bill is 6.6294 cm wide, by 15.5956 cm long, and 0.010922 cm in thickness. It would take approximately 96,721,648 dollar bills to make up one square kilometre.
The volume taken up by these dollar bills would be 12,068,253 cubic meters. This would fill over 90% of the largest building in the world, the Boeing Plant in Everett, Washington designed to assemble Boeing 747 planes.
If we were to cover an area with enough dollar bills equal to the current US debt it would have an area of 110,493 square kilometres which would nearly cover the entire state of Virginia!
When stacked, the number of dollar bills required to represent the US debt would be 1,167,243 km high. This is about 3 times the distance to the moon!

Laid end to end the dollar bills would measure 1,664,460,767 km which is longer than the distance of Saturn at its furthest point from the Sun. Uranus is 2.974 million kilometers away from the sun (about $19.1 trillion required).

Thought of in this context, we can truly say that the US debt is astronomical!