8666680 has 32 divisors (see below), whose sum is σ = 21273840. Its totient is φ = 3151360.

The previous prime is 8666627. The next prime is 8666681. The reversal of 8666680 is 866668.

8666680 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8666680² = 150222684444800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8666681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9409 + ... + 10288.

Almost surely, 2^8666680 is an apocalyptic number.

It is an amenable number.

8666680 is an abundant number, since it is smaller than the sum of its proper divisors (12607160).

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

8666680 is a wasteful number, since it uses less digits than its factorization.

8666680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19719 (or 19715 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 8666680 is about 2943.9225533291. The cubic root of 8666680 is about 205.4081102624.

It can be divided in two parts, 86 and 66680, that added together give a palindrome (66766).

The spelling of 8666680 in words is "eight million, six hundred sixty-six thousand, six hundred eighty".