That is 66 million 100 dollar bills (the largest denomination printed). Can you imaging the physical bulk of that much cash? Think truckload, shipping container full.
I don’t know that a half million dollars in 20’s would fit in a carry-on bag. I used to work where we kept it on pallets and moved it with a forklift, and the most we ever had on hand about 50 million.
http://www.guardian.co.uk/world/2007/feb/08/usa.iraq1