Oil prices hovered above $66 a barrel Friday in Asia in light holiday trading a day after grim unemployment numbers from the U.S. and Europe sent crude prices tumbling, AP reported. Benchmark crude for August delivery slipped 30 cents to $66.46 a barrel by late afternoon Singapore time in electronic trading on the New York Mercantile Exchange. On Thursday, it fell $2.58, nearly 4 percent, to settle at $66.73. Trading in the U.S. is closed Friday for the Independence Day holiday. In other Nymex trading, gasoline for August delivery was steady at $1.78 a gallon and heating oil held at $1.70. Natural gas for August delivery rose 5.6 cents to $3.67 per 1,000 cubic feet. In London, Brent prices slid 30 cents to $66.33 a barrel on the ICE Futures exchange.