66373686 has 12 divisors (see below), whose sum is σ = 143809692. Its totient is φ = 22124556.

The previous prime is 66373679. The next prime is 66373733. The reversal of 66373686 is 68637366.

66373686 is a `hidden beast` number, since 6 + 637 + 3 + 6 + 8 + 6 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1843696 + ... + 1843731.

It is an arithmetic number, because the mean of its divisors is an integer number (11984141).

Almost surely, 2^66373686 is an apocalyptic number.

66373686 is an abundant number, since it is smaller than the sum of its proper divisors (77436006).

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

66373686 is a wasteful number, since it uses less digits than its factorization.

66373686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687435 (or 3687432 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 66373686 is about 8147.0047256645. The cubic root of 66373686 is about 404.8852715723.

The spelling of 66373686 in words is "sixty-six million, three hundred seventy-three thousand, six hundred eighty-six".