1776

1776 = 2 x 2 x 2 x 2 x 3 x 37.

1776 is a number that can be expressed as the product of numbers made of only fours (A161142): 1776 =  4 x 444.

1776 is 5115 in base 7.

1776 is a rhombic matchstick number (A045944).

1776 is a number with 20 divisors (A030638).

1776 is the difference of two positive fourth powers (A147857).

1776 divides 73² - 1.

Source: OEIS