8256866780 has 24 divisors (see below), whose sum is σ = 17341129680. Its totient is φ = 3302421120.

The previous prime is 8256866777. The next prime is 8256866791. The reversal of 8256866780 is 876686528.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373640 + ... + 395120.

It is an arithmetic number, because the mean of its divisors is an integer number (722547070).

Almost surely, 2^8256866780 is an apocalyptic number.

It is an amenable number.

8256866780 is an abundant number, since it is smaller than the sum of its proper divisors (9084262900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8256866780 is a wasteful number, since it uses less digits than its factorization.

8256866780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40709 (or 40707 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The square root of 8256866780 is about 90867.3031403486. The cubic root of 8256866780 is about 2021.1804670890.

The spelling of 8256866780 in words is "eight billion, two hundred fifty-six million, eight hundred sixty-six thousand, seven hundred eighty".