256776676 has 24 divisors (see below), whose sum is σ = 485675064. Its totient is φ = 118083840.

The previous prime is 256776593. The next prime is 256776691. The reversal of 256776676 is 676677652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36966400 + 219810276 = 6080^2 + 14826^2 .

It is a super-2 number, since 2×256776676² = 131868522675217952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5826 + ... + 23398.

It is an arithmetic number, because the mean of its divisors is an integer number (20236461).

Almost surely, 2^256776676 is an apocalyptic number.

256776676 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

256776676 is a deficient number, since it is larger than the sum of its proper divisors (228898388).

256776676 is a wasteful number, since it uses less digits than its factorization.

256776676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17871 (or 17869 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 52.

The square root of 256776676 is about 16024.2527438879. The cubic root of 256776676 is about 635.6019059813.

The spelling of 256776676 in words is "two hundred fifty-six million, seven hundred seventy-six thousand, six hundred seventy-six".