Lotto outlets say they dealt with high customer numbers all day, and many shops had their busiest day.
Had the big jackpot gone to a single winner, Lotto says it would have been the second-largest Powerball prize won in New Zealand.
Last November, a young Hibiscus Coast couple won $44 million with Powerball, Lotto NZ said.
They said they'd caught up with the winners "to find out how a year in the life of a Powerball winner has been and to pass on advice" to anyone who won a big amount.
"The winner agreed that a large win can seem overwhelming at first, and in the first few weeks," Lotto NZ said.
"'Don't have a heart attack', laughed the winner.
"'And try to remember to eat and sleep in the first few weeks'.
The couple credited solid financial advice for helping them navigate their first year as multi-millionaires, Lotto said.
"I recommend getting a really good financial advisor – someone who is on the same wavelength as you," the winner told Lotto.
"They can help you map out a good idea of what you want to achieve with your winnings, including gifts, investing for the future, and just making sure the money will last."