256606671 has 16 divisors (see below), whose sum is σ = 351394560. Its totient is φ = 166474560.

The previous prime is 256606667. The next prime is 256606673. The reversal of 256606671 is 176606652.

It is not a de Polignac number, because 256606671 - 2² = 256606667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256606673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32710 + ... + 39788.

It is an arithmetic number, because the mean of its divisors is an integer number (21962160).

Almost surely, 2^256606671 is an apocalyptic number.

256606671 is a deficient number, since it is larger than the sum of its proper divisors (94787889).

256606671 is a wasteful number, since it uses less digits than its factorization.

256606671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7406.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 256606671 is about 16018.9472500536. The cubic root of 256606671 is about 635.4616033139.

The spelling of 256606671 in words is "two hundred fifty-six million, six hundred six thousand, six hundred seventy-one".