6689660 has 24 divisors (see below), whose sum is σ = 14315616. Its totient is φ = 2624960.

The previous prime is 6689659. The next prime is 6689681. The reversal of 6689660 is 669866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2096 + ... + 4215.

It is an arithmetic number, because the mean of its divisors is an integer number (596484).

Almost surely, 2^6689660 is an apocalyptic number.

It is an amenable number.

6689660 is an abundant number, since it is smaller than the sum of its proper divisors (7625956).

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

6689660 is a wasteful number, since it uses less digits than its factorization.

6689660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373 (or 6371 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 6689660 is about 2586.4377046432. The cubic root of 6689660 is about 188.4233330429.

The spelling of 6689660 in words is "six million, six hundred eighty-nine thousand, six hundred sixty".