The 62-year-old’s windfall meant he was nolonger entitled to state handouts because he had more than the maximum £16,000 capital allowed in the bank.
Though he posed for publicity photos with fellow winners in Swansea, south Wales, he did not inform benefits bosses.
Instead he carried on claiming employment support allowance and housing benefit while spending his fortune.
He went on holiday to Walt Disney World in Florida, bought a new £22,000 car, a motorhome and lavished gifts on his partner and sister.
By the time investigators discovered his secret fortune two years later he only had £7,665 left.
Burrows said he had not declared his win because he regarded the cash as “family money” and not his own.
He was jailed for 24 weeks at Swansea Crown Court after admitting five fraud charges.
The court heard he had previous convictions for theft, taking a car without the owner’s consent, burglary, and assault with intent to commit robbery but he had kept out of trouble for 30 years.
His lawyer Frank Phillips said Burrows’ behaviour “will not have impressed the court or anyone else” and said his thinking had been “disturbed”.
Judge Keith Thomas said Burrows had shown “little or no remorse” for a “deliberate and determined fraud”.