If you reply with the (found on the printer itself), I can give you the exact download link for your operating system.
I understand you're looking for help with the printer driver. However, I need to be upfront: after checking Canon’s official product databases and major driver archives, there is no widely recognized Canon printer model named “F166 500.” Canon F166 500 Printer Driver Download WORK
This appears to be a common or a mislabeled device. Using the wrong driver can cause the printer to malfunction or not work at all. If you reply with the (found on the