8256668477 has 8 divisors (see below), whose sum is σ = 8755754616. Its totient is φ = 7759071232.

The previous prime is 8256668473. The next prime is 8256668507. The reversal of 8256668477 is 7748666528.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 622452601 + 7634215876 = 24949^2 + 87374^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8256668477 - 2² = 8256668473 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 (8256668471) 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 7 ways as a sum of consecutive naturals, for example, 360788 + ... + 382989.

It is an arithmetic number, because the mean of its divisors is an integer number (1094469327).

Almost surely, 2^8256668477 is an apocalyptic number.

It is an amenable number.

8256668477 is a deficient number, since it is larger than the sum of its proper divisors (499086139).

8256668477 is a wasteful number, since it uses less digits than its factorization.

8256668477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744447.

The product of its digits is 27095040, while the sum is 59.

The square root of 8256668477 is about 90866.2119657246. The cubic root of 8256668477 is about 2021.1642862394.

The spelling of 8256668477 in words is "eight billion, two hundred fifty-six million, six hundred sixty-eight thousand, four hundred seventy-seven".