8166400256 has 36 divisors (see below), whose sum is σ = 18629604672. Its totient is φ = 3499885056.

The previous prime is 8166400237. The next prime is 8166400289. The reversal of 8166400256 is 6520046618.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276780 + ... + 2280363.

Almost surely, 2^8166400256 is an apocalyptic number.

It is an amenable number.

8166400256 is an abundant number, since it is smaller than the sum of its proper divisors (10463204416).

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

8166400256 is an equidigital number, since it uses as much as digits as its factorization.

8166400256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557166 (or 4557152 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 8166400256 is about 90368.1373936633. The cubic root of 8166400256 is about 2013.7716412895.

The spelling of 8166400256 in words is "eight billion, one hundred sixty-six million, four hundred thousand, two hundred fifty-six".