66666624224 has 24 divisors (see below), whose sum is σ = 138157808040. Its totient is φ = 31578926976.

The previous prime is 66666624191. The next prime is 66666624229. The reversal of 66666624224 is 42242666666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666624229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54823919 + ... + 54825134.

It is an arithmetic number, because the mean of its divisors is an integer number (5756575335).

Almost surely, 2^66666624224 is an apocalyptic number.

It is an amenable number.

66666624224 is an abundant number, since it is smaller than the sum of its proper divisors (71491183816).

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

66666624224 is a wasteful number, since it uses less digits than its factorization.

66666624224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109649082 (or 109649074 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 50.

The spelling of 66666624224 in words is "sixty-six billion, six hundred sixty-six million, six hundred twenty-four thousand, two hundred twenty-four".