66 OHMS, 2000 WATTS, 115V, 60 Hz. The only number you would use is the 66 Ohms, but that's wrong. 2000 Watts at 115 V is 6.6 Ohms, but anyway...
I = E/R
R = 66
E = 12
I = 12/66
I = 1.82 Amps at 12 V in your car.

Then P = EI
P = 12 x 1.82
P = 21.8 Watts worth of heat

And if it has a 120 VAC fan, it would be unhappy at 12 VDC.