256666038622 has 8 divisors (see below), whose sum is σ = 439998923376. Its totient is φ = 109999730832.

The previous prime is 256666038593. The next prime is 256666038647. The reversal of 256666038622 is 226830666652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 256666038622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9166644223 + ... + 9166644250.

It is an arithmetic number, because the mean of its divisors is an integer number (54999865422).

Almost surely, 2^256666038622 is an apocalyptic number.

256666038622 is a deficient number, since it is larger than the sum of its proper divisors (183332884754).

256666038622 is a wasteful number, since it uses less digits than its factorization.

256666038622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333288482.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 256666038622 in words is "two hundred fifty-six billion, six hundred sixty-six million, thirty-eight thousand, six hundred twenty-two".