256316705066 has 8 divisors (see below), whose sum is σ = 389341830720. Its totient is φ = 126536094828.

The previous prime is 256316705053. The next prime is 256316705077. The reversal of 256316705066 is 660507613652.

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 256316705066.

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, 811128656 + ... + 811128971.

It is an arithmetic number, because the mean of its divisors is an integer number (48667728840).

Almost surely, 2^256316705066 is an apocalyptic number.

256316705066 is a deficient number, since it is larger than the sum of its proper divisors (133025125654).

256316705066 is a wasteful number, since it uses less digits than its factorization.

256316705066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622257708.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 256316705066 in words is "two hundred fifty-six billion, three hundred sixteen million, seven hundred five thousand, sixty-six".