256665112 has 16 divisors (see below), whose sum is σ = 524997000. Its totient is φ = 116665920.

The previous prime is 256665107. The next prime is 256665121. The reversal of 256665112 is 211566652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1458237 + ... + 1458412.

Almost surely, 2^256665112 is an apocalyptic number.

256665112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256665112 is an abundant number, since it is smaller than the sum of its proper divisors (268331888).

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

256665112 is a wasteful number, since it uses less digits than its factorization.

256665112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916666 (or 2916662 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 256665112 is about 16020.7712673267. The cubic root of 256665112 is about 635.5098408136.

The spelling of 256665112 in words is "two hundred fifty-six million, six hundred sixty-five thousand, one hundred twelve".