256066447 has 8 divisors (see below), whose sum is σ = 315158816. Its totient is φ = 202601952.

The previous prime is 256066441. The next prime is 256066451. The reversal of 256066447 is 744660652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256066447 - 2²⁷ = 121848719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256066441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406868 + ... + 1407049.

It is an arithmetic number, because the mean of its divisors is an integer number (39394852).

Almost surely, 2^256066447 is an apocalyptic number.

256066447 is a deficient number, since it is larger than the sum of its proper divisors (59092369).

256066447 is a wasteful number, since it uses less digits than its factorization.

256066447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813937.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 256066447 is about 16002.0763340262. The cubic root of 256066447 is about 635.0153525129.

The spelling of 256066447 in words is "two hundred fifty-six million, sixty-six thousand, four hundred forty-seven".