256622402000667 has 4 divisors (see below), whose sum is σ = 342163202667560. Its totient is φ = 171081601333776.

The previous prime is 256622402000599. The next prime is 256622402000711. The reversal of 256622402000667 is 766000204226652.

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

It is not a de Polignac number, because 256622402000667 - 2²² = 256622397806363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256622402002667) 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, 42770400333442 + ... + 42770400333447.

It is an arithmetic number, because the mean of its divisors is an integer number (85540800666890).

Almost surely, 2^{256622402000667} is an apocalyptic number.

256622402000667 is a deficient number, since it is larger than the sum of its proper divisors (85540800666893).

256622402000667 is an equidigital number, since it uses as much as digits as its factorization.

256622402000667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85540800666892.

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 256622402000667 in words is "two hundred fifty-six trillion, six hundred twenty-two billion, four hundred two million, six hundred sixty-seven", and thus it is an aban number.