8678388666 has 32 divisors (see below), whose sum is σ = 17423884800. Its totient is φ = 2881635120.

The previous prime is 8678388661. The next prime is 8678388673. The reversal of 8678388666 is 6668838768.

It is a junction number, because it is equal to n+sod(n) for n = 8678388597 and 8678388606.

It is not an unprimeable number, because it can be changed into a prime (8678388661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821195 + ... + 1825953.

It is an arithmetic number, because the mean of its divisors is an integer number (544496400).

Almost surely, 2^8678388666 is an apocalyptic number.

8678388666 is an abundant number, since it is smaller than the sum of its proper divisors (8745496134).

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

8678388666 is a wasteful number, since it uses less digits than its factorization.

8678388666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5874.

The product of its digits is 111476736, while the sum is 66.

The square root of 8678388666 is about 93157.8695870617. The cubic root of 8678388666 is about 2055.0057060835.

The spelling of 8678388666 in words is "eight billion, six hundred seventy-eight million, three hundred eighty-eight thousand, six hundred sixty-six".