655776 has 120 divisors (see below), whose sum is σ = 2195424. Its totient is φ = 190080.

The previous prime is 655757. The next prime is 655807. The reversal of 655776 is 677556.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 655776.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28501 + ... + 28523.

2⁶⁵⁵⁷⁷⁶ is an apocalyptic number.

655776 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097712).

655776 is an abundant number, since it is smaller than the sum of its proper divisors (1539648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655776 is a wasteful number, since it uses less digits than its factorization.

655776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 39 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 655776 is about 809.7999753025. The cubic root of 655776 is about 86.8797387129.

It can be divided in two parts, 655 and 776, that added together give a triangular number (1431 = T₅₃).

The spelling of 655776 in words is "six hundred fifty-five thousand, seven hundred seventy-six".