180685866 has 8 divisors (see below), whose sum is σ = 361371744. Its totient is φ = 60228620.

The previous prime is 180685859. The next prime is 180685867. The reversal of 180685866 is 668586081.

It is a happy number.

180685866 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

180685866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (180685867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15057150 + ... + 15057161.

It is an arithmetic number, because the mean of its divisors is an integer number (45171468).

Almost surely, 2^180685866 is an apocalyptic number.

180685866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

180685866 is a wasteful number, since it uses less digits than its factorization.

180685866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30114316.

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 180685866 is about 13441.9442790096. The cubic root of 180685866 is about 565.3378468617.

The spelling of 180685866 in words is "one hundred eighty million, six hundred eighty-five thousand, eight hundred sixty-six".