778 = 2 x 389.
778 has a representation as a sum of two squares: 778 = 72 + 272.
778 is the number of ways a 5 x 1 rectangle can be surrounded by 5 x 1 rectangles.
778 is a Smith number. The sum of its digits is equal to the sum of the digits of its prime factors: 7 + 7 + 8 = 2 + 3 + 8 + 9.
778 is a telephone area code for British Columbia.
