66°C would equal 151°F. It's a good temperature for nice, hot soup, but not live people. If you're cooking someone, you'd want an internal temperature of 165°F, 14° higher. Most food should be cooked to an internal temp of at least 145°F. Of course, the exterior temperature is usually higher, so 151° would be more of a very slow roasting temperature.

66°F=19°F and 45°F=7°C. (Thanks to the Temperature Converter thingie Jon Freeman created.)