6600686670 has 24 divisors (see below), whose sum is σ = 17161785576. Its totient is φ = 1760183088.

The previous prime is 6600686641. The next prime is 6600686681. The reversal of 6600686670 is 766860066.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36670392 + ... + 36670571.

It is an arithmetic number, because the mean of its divisors is an integer number (715074399).

Almost surely, 2^6600686670 is an apocalyptic number.

6600686670 is an abundant number, since it is smaller than the sum of its proper divisors (10561098906).

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

6600686670 is a wasteful number, since it uses less digits than its factorization.

6600686670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73340976 (or 73340973 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 6600686670 is about 81244.6100981474. The cubic root of 6600686670 is about 1875.8425056416.

The spelling of 6600686670 in words is "six billion, six hundred million, six hundred eighty-six thousand, six hundred seventy".