256707740666367 has 24 divisors (see below), whose sum is σ = 387058389610464. Its totient is φ = 163639906873344.

The previous prime is 256707740666357. The next prime is 256707740666371. The reversal of 256707740666367 is 763666047707652.

It is not a de Polignac number, because 256707740666367 - 2³⁴ = 256690560797183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256707740666295 and 256707740666304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256707740666357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218286498 + ... + 219459359.

It is an arithmetic number, because the mean of its divisors is an integer number (16127432900436).

Almost surely, 2^{256707740666367} is an apocalyptic number.

256707740666367 is a deficient number, since it is larger than the sum of its proper divisors (130350648944097).

256707740666367 is a wasteful number, since it uses less digits than its factorization.

256707740666367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437748719 (or 437748716 counting only the distinct ones).

The product of its (nonzero) digits is 2240421120, while the sum is 72.

The spelling of 256707740666367 in words is "two hundred fifty-six trillion, seven hundred seven billion, seven hundred forty million, six hundred sixty-six thousand, three hundred sixty-seven".