Numbers is a plural noun and a 3rd person present for the word "NUMBER."
1. An arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations.
2. A quantity or amount.
3. Amount to (a specified figure or quantity); comprise.
4. Mark with a number or assign a number to, typically to indicate the position in a series.
I don't remember the last 2 numbers of his mobile number.