Yes, but...
You'll need to use a Truvativ/Sram compatible bottom bracket. The Sram crank spindle is different diameter on one end (tapered), while Shimano is same size both ends (untapered). If you used any Sram crank with a Shimano/Shimano compatible BB, you'll have play on the drive side.
Other than that, no problem using with the rest of the bits 6600.
One of my bikes has Sram chainrings, chain and cassette... Everything else is Ultegra 6600. Works great.