You should give up your job and SPEND IT.
If you decide that, even at the age of 76, you will continue working and "it will not change our lives" you should give alot of it to charity so it can change lives.
I know it isn't that cut and dried but I get so pissed off with the "ooh it won't change anything" brigade when they have massive wins.
THere are too many people in this world whose lives would be changed hugely by £1000, let alone £26 million.
Why do the lottery if you don't want to spend it?