make it at least 50c preflop, I'd put it to 60c personally. You're going to be out of position the whole hand and you have a limp parade in front of you with a wide range of holdings

flop is as everyone else said, don't cbet with air into 73935035 people
turn bet is an easy call for pot odds
river is a definite fold - 5 people saw the flop and you think they all missed?