256660206 has 32 divisors (see below), whose sum is σ = 573015168. Its totient is φ = 75966240.

The previous prime is 256660147. The next prime is 256660219. The reversal of 256660206 is 602066652.

It is a super-2 number, since 2×256660206² = 131748922687924872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42381 + ... + 48056.

It is an arithmetic number, because the mean of its divisors is an integer number (17906724).

Almost surely, 2^256660206 is an apocalyptic number.

256660206 is an abundant number, since it is smaller than the sum of its proper divisors (316354962).

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

256660206 is a wasteful number, since it uses less digits than its factorization.

256660206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90496.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 256660206 is about 16020.6181528679. The cubic root of 256660206 is about 635.5057916578.

The spelling of 256660206 in words is "two hundred fifty-six million, six hundred sixty thousand, two hundred six".