256008667 has 4 divisors (see below), whose sum is σ = 256204080. Its totient is φ = 255813256.

The previous prime is 256008659. The next prime is 256008673. The reversal of 256008667 is 766800652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256008667 - 2³ = 256008659 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256008617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95728 + ... + 98365.

It is an arithmetic number, because the mean of its divisors is an integer number (64051020).

Almost surely, 2^256008667 is an apocalyptic number.

256008667 is a deficient number, since it is larger than the sum of its proper divisors (195413).

256008667 is a wasteful number, since it uses less digits than its factorization.

256008667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195412.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 256008667 is about 16000.2708414577. The cubic root of 256008667 is about 634.9675863340.

The spelling of 256008667 in words is "two hundred fifty-six million, eight thousand, six hundred sixty-seven".