Hewer, who took over as host of the long-running Channel 4 quiz show last year, actually made a joke to journalists when asked about rumours that the show was coming to an end.
"I've got a contract right through until 2014. So to be honest with you, I'd be sad... but I'd be in the money," he said.
Hewer's Apprentice co-star Lord Sugar laughed: "That's 25 years of training [from me]."
Hewer described Countdown as a "great institution" when he took over the helm from Jeff Stelling last year.
"It's not unlike the monarchy or the National Health Service, or any other great institution that this country has come to depend on in a way," he told Digital Spy.
"It's a punctuation mark in the stability of British society. How's that for a grandiose quote? It's a comma or an exclamation mark in the fabric of British society."
Countdown currently airs on weekdays at 2.45pm on Channel 4.
The Apprentice returns for a ninth series on Tuesday, May 7 at 9pm on BBC One.