256676806 has 4 divisors (see below), whose sum is σ = 385015212. Its totient is φ = 128338402.

The previous prime is 256676789. The next prime is 256676831. The reversal of 256676806 is 608676652.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64169200 + ... + 64169203.

It is an arithmetic number, because the mean of its divisors is an integer number (96253803).

Almost surely, 2^256676806 is an apocalyptic number.

256676806 is a deficient number, since it is larger than the sum of its proper divisors (128338406).

256676806 is a wasteful number, since it uses less digits than its factorization.

256676806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128338405.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 256676806 is about 16021.1362268723. The cubic root of 256676806 is about 635.5194922217.

The spelling of 256676806 in words is "two hundred fifty-six million, six hundred seventy-six thousand, eight hundred six".