256066659 has 12 divisors (see below), whose sum is σ = 385955856. Its totient is φ = 163288752.

The previous prime is 256066649. The next prime is 256066693. The reversal of 256066659 is 956660652.

It is not a de Polignac number, because 256066659 - 2⁵ = 256066627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256066649) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 618312 + ... + 618725.

It is an arithmetic number, because the mean of its divisors is an integer number (32162988).

Almost surely, 2^256066659 is an apocalyptic number.

256066659 is a deficient number, since it is larger than the sum of its proper divisors (129889197).

256066659 is a wasteful number, since it uses less digits than its factorization.

256066659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237066 (or 1237063 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The square root of 256066659 is about 16002.0829581652. The cubic root of 256066659 is about 635.0155277580.

The spelling of 256066659 in words is "two hundred fifty-six million, sixty-six thousand, six hundred fifty-nine".