6686666000 has 80 divisors (see below), whose sum is σ = 18478162560. Its totient is φ = 2292566400.

The previous prime is 6686665969. The next prime is 6686666017. The reversal of 6686666000 is 6666866.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224810 + ... + 252809.

It is an arithmetic number, because the mean of its divisors is an integer number (230977032).

Almost surely, 2^6686666000 is an apocalyptic number.

It is an amenable number.

6686666000 is an abundant number, since it is smaller than the sum of its proper divisors (11791496560).

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

6686666000 is a wasteful number, since it uses less digits than its factorization.

6686666000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477649 (or 477633 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 6686666000 is about 81772.0367851994. The cubic root of 6686666000 is about 1883.9521882677.

The spelling of 6686666000 in words is "six billion, six hundred eighty-six million, six hundred sixty-six thousand".