66618168 has 32 divisors (see below), whose sum is σ = 167769360. Its totient is φ = 22042880.

The previous prime is 66618151. The next prime is 66618169. The reversal of 66618168 is 86181666.

66618168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66618169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6843 + ... + 13418.

Almost surely, 2^66618168 is an apocalyptic number.

It is an amenable number.

66618168 is an abundant number, since it is smaller than the sum of its proper divisors (101151192).

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

66618168 is a wasteful number, since it uses less digits than its factorization.

66618168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20407 (or 20403 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 66618168 is about 8161.9953442770. The cubic root of 66618168 is about 405.3817829561.

The spelling of 66618168 in words is "sixty-six million, six hundred eighteen thousand, one hundred sixty-eight".