256830667 has 2 divisors, whose sum is σ = 256830668. Its totient is φ = 256830666.

The previous prime is 256830649. The next prime is 256830671. The reversal of 256830667 is 766038652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256830667 - 2²⁷ = 122612939 is a prime.

It is not a weakly prime, because it can be changed into another prime (256830617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128415333 + 128415334.

It is an arithmetic number, because the mean of its divisors is an integer number (128415334).

Almost surely, 2^256830667 is an apocalyptic number.

256830667 is a deficient number, since it is larger than the sum of its proper divisors (1).

256830667 is an equidigital number, since it uses as much as digits as its factorization.

256830667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 256830667 is about 16025.9373204814. The cubic root of 256830667 is about 635.6464510157.

The spelling of 256830667 in words is "two hundred fifty-six million, eight hundred thirty thousand, six hundred sixty-seven".