A bet on one number only, called a straight-up bet, pays 35 to 1. (You collect 36. With no house advantage you should collect 37 (38 in the USA on double zero roulette wheels).
A two-number bet, called split bet, pays 17 to 1.
A three-number bet, called street bet, pays 11 to 1.
A four-number bet, called corner bet, pays 8 to 1.
A six-number bet, pays 5 to 1.
A bet on the outside dozen or column, pays 2 to 1.
A bet on the outside even money bets, pays 1 to 1.