177 = 3 x 59.
177 is a digitally balanced number: In its binary representation (10110001), it has the same number of zeros as ones.
177 is the smallest possible magic constant for a 3 x 3 prime magic square.
177 is the number of graphs with seven edges.
Each internal angle of a regular 120-sided polygon is 177 degrees.
177 Irma is a fairly large, dark asteroid discovered in 1877.
Source: Number Gossip