256796942666 has 8 divisors (see below), whose sum is σ = 420213178944. Its totient is φ = 116725883020.

The previous prime is 256796942657. The next prime is 256796942671. The reversal of 256796942666 is 666249697652.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 256796942596 and 256796942605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5836294130 + ... + 5836294173.

It is an arithmetic number, because the mean of its divisors is an integer number (52526647368).

Almost surely, 2^256796942666 is an apocalyptic number.

256796942666 is a deficient number, since it is larger than the sum of its proper divisors (163416236278).

256796942666 is a wasteful number, since it uses less digits than its factorization.

256796942666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11672588316.

The product of its digits is 352719360, while the sum is 68.

The spelling of 256796942666 in words is "two hundred fifty-six billion, seven hundred ninety-six million, nine hundred forty-two thousand, six hundred sixty-six".