The Sensex rose 333.35 points, or 0.50%, to close at 66,598.91. The Nifty gained 92.90 points, or 0.47%, to end at 19,819.95. Both indices, which have gained 1.3% last week and 2.2% in the past six trading sessions, are less than a per cent away from their all-time highs hit on July 20.