6668680 has 32 divisors (see below), whose sum is σ = 15082200. Its totient is φ = 2653696.

The previous prime is 6668659. The next prime is 6668687. The reversal of 6668680 is 868666.

6668680 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5788836 + 879844 = 2406^2 + 938^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6668687) 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, 11436 + ... + 12004.

Almost surely, 2^6668680 is an apocalyptic number.

It is an amenable number.

6668680 is an abundant number, since it is smaller than the sum of its proper divisors (8413520).

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

6668680 is a wasteful number, since it uses less digits than its factorization.

6668680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 869 counting only the distinct ones).

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

The square root of 6668680 is about 2582.3787483636. The cubic root of 6668680 is about 188.2261500613.

It can be divided in two parts, 66686 and 80, that added together give a palindrome (66766).

The spelling of 6668680 in words is "six million, six hundred sixty-eight thousand, six hundred eighty".