The following highways are numbered 666: Belgium The pilgrimage centre of Banneux in Belgium is located on the N666 road. Canada Alberta Highway 666 Ontario Highway 666 (former) Ireland R666 Italy Strada regionale 666 di Sora (formerly ''strada statale 666 di Sora) Philippines N666 highway (Philippines) Sweden Länsväg 666, in Uppland, eastbound from Alunda. United Kingdom A666 road United States (former)