2256666263 has 4 divisors (see below), whose sum is σ = 2256990288. Its totient is φ = 2256342240.

The previous prime is 2256666253. The next prime is 2256666283. The reversal of 2256666263 is 3626666522.

It is a happy number.

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 2256666263 - 2⁸ = 2256666007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256666253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151331 + ... + 165572.

It is an arithmetic number, because the mean of its divisors is an integer number (564247572).

Almost surely, 2^2256666263 is an apocalyptic number.

2256666263 is a deficient number, since it is larger than the sum of its proper divisors (324025).

2256666263 is an equidigital number, since it uses as much as digits as its factorization.

2256666263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324024.

The product of its digits is 933120, while the sum is 44.

The square root of 2256666263 is about 47504.3815137088. The cubic root of 2256666263 is about 1311.6635360609.

The spelling of 2256666263 in words is "two billion, two hundred fifty-six million, six hundred sixty-six thousand, two hundred sixty-three".