256666954698 has 48 divisors (see below), whose sum is σ = 693334115136. Its totient is φ = 66666741120.

The previous prime is 256666954681. The next prime is 256666954711. The reversal of 256666954698 is 896459666652.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92591311 + ... + 92594082.

It is an arithmetic number, because the mean of its divisors is an integer number (14444460732).

Almost surely, 2^256666954698 is an apocalyptic number.

256666954698 is an abundant number, since it is smaller than the sum of its proper divisors (436667160438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256666954698 is a wasteful number, since it uses less digits than its factorization.

256666954698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185185419 (or 185185416 counting only the distinct ones).

The product of its digits is 1007769600, while the sum is 72.

The spelling of 256666954698 in words is "two hundred fifty-six billion, six hundred sixty-six million, nine hundred fifty-four thousand, six hundred ninety-eight".