Driver for the F16640 can be downloaded below, accourding to all information available there is a few reasons why this model number get confused with make numbers, but in any case we have tested the drivers for Canon and they work for printer models with the numbers F16640/F166400 printer on the back of the model.
What Toner does the ImageCLASS F166400 use?
Canon Compatible 125 / 3484B001AA Black Toner Cartridges