More than two million people bought tickets hoping for a chance of winning big money.
Investment adviser and chairperson of Summer Kiwisaver Investment Committee Martin Hawes said the winners would receive a life-changing amount of money.
"Their life is going to be different with that sort of money and they have to get used to the idea," Hawes said.
"The first thing that these very lucky winners should do is nothing," he said.
Investment advisor Martin Hawes says Lotto winners should "do nothing" until they get used to their windfall. Photo / file
"Put it in the bank, maybe put it in four or five different banks so it's well diversified, maybe pay off a mortgage, maybe buy one or two little things that they've always wanted."
He advised people to keep it confidential if they could.
"Not only will family come out of the woodwork, but friends and people with all sorts of worthy charities.
"Basically, Uncle Tom and all of the others who will be looking for money."
Hawes said Lotto winners needed to be careful because it was easy to spend it all.
"I heard of a study from the UK that said that of the people who got a large, unexpected windfall, within five years, 75 per cent of them were back where they started."
