Although the number is higher than the 612 million voters who cast their ballots in the previous election in 2019, it is about one percentage point lower than the 67.4% turnout five years back.
The seven-phase 2024 vote began on April 19 and was held in scorching summer heat in many parts of the country, with temperatures rising to nearly 50 degrees Celsius (122°F) in some north and northwestern regions.
The voter turnout was possibly lower in the initial phases because there was no single major issue to draw voters out, analysts said, as Prime Minister Narendra Modi sought a rare, third consecutive term.
Modi's Bharatiya Janata Party (BJP)-led alliance is projected to win a big majority, TV exit polls said on Saturday, ahead of the counting on Tuesday.
