66038685884 has 24 divisors (see below), whose sum is σ = 116282313840. Its totient is φ = 32815321344.

The previous prime is 66038685883. The next prime is 66038685917. The reversal of 66038685884 is 48858683066.

It is a super-2 number, since 2×66038685884² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66038685883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838852 + ... + 1874420.

It is an arithmetic number, because the mean of its divisors is an integer number (4845096410).

Almost surely, 2^66038685884 is an apocalyptic number.

It is an amenable number.

66038685884 is a deficient number, since it is larger than the sum of its proper divisors (50243627956).

66038685884 is a wasteful number, since it uses less digits than its factorization.

66038685884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38429 (or 38427 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 62.

The spelling of 66038685884 in words is "sixty-six billion, thirty-eight million, six hundred eighty-five thousand, eight hundred eighty-four".