256061534666 has 32 divisors (see below), whose sum is σ = 450906056832. Its totient is φ = 106755848640.

The previous prime is 256061534609. The next prime is 256061534681. The reversal of 256061534666 is 666435160652.

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 15 ways as a sum of consecutive naturals, for example, 3114560 + ... + 3195716.

It is an arithmetic number, because the mean of its divisors is an integer number (14090814276).

Almost surely, 2^256061534666 is an apocalyptic number.

256061534666 is a deficient number, since it is larger than the sum of its proper divisors (194844522166).

256061534666 is a wasteful number, since it uses less digits than its factorization.

256061534666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87294.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 256061534666 in words is "two hundred fifty-six billion, sixty-one million, five hundred thirty-four thousand, six hundred sixty-six".