8668440866 has 8 divisors (see below), whose sum is σ = 13451029020. Its totient is φ = 4184764528.

The previous prime is 8668440863. The next prime is 8668440883. The reversal of 8668440866 is 6680448668.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7757910241 + 910530625 = 88079^2 + 30175^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8668440863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74727881 + ... + 74727996.

Almost surely, 2^8668440866 is an apocalyptic number.

8668440866 is a deficient number, since it is larger than the sum of its proper divisors (4782588154).

8668440866 is a wasteful number, since it uses less digits than its factorization.

8668440866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149455908.

The product of its (nonzero) digits is 10616832, while the sum is 56.

The square root of 8668440866 is about 93104.4621164851. The cubic root of 8668440866 is about 2054.2202068957.

The spelling of 8668440866 in words is "eight billion, six hundred sixty-eight million, four hundred forty thousand, eight hundred sixty-six".