It is not a prime number, because it can be divided by 3 and 59: 177 = 3 × 59
It is a composite number, which means it has more than two factors.
The digits of 177 add up to 15 (1 + 7 + 7 = 15).
177 is a palindromic number in base 12 (it reads the same forward and backward as 131 in base 12).
Sports
In the game of darts, scoring 177 in one turn is done by hitting three triple 19s; it is also the second-highest possible score in the game, just behind 180.