2256866477 has 2 divisors, whose sum is σ = 2256866478. Its totient is φ = 2256866476.

The previous prime is 2256866441. The next prime is 2256866503. The reversal of 2256866477 is 7746686522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653967561 + 602898916 = 40669^2 + 24554^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256866477 - 2⁸ = 2256866221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256860477) 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 as a sum of consecutive naturals, namely, 1128433238 + 1128433239.

It is an arithmetic number, because the mean of its divisors is an integer number (1128433239).

Almost surely, 2^2256866477 is an apocalyptic number.

It is an amenable number.

2256866477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256866477 is an equidigital number, since it uses as much as digits as its factorization.

2256866477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 53.

The square root of 2256866477 is about 47506.4887883750. The cubic root of 2256866477 is about 1311.7023256745.

The spelling of 2256866477 in words is "two billion, two hundred fifty-six million, eight hundred sixty-six thousand, four hundred seventy-seven".