66893223824 has 40 divisors (see below), whose sum is σ = 151565388480. Its totient is φ = 28001812608.

The previous prime is 66893223739. The next prime is 66893223833. The reversal of 66893223824 is 42832239866.

66893223824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66893223824² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6940079 + ... + 6949710.

It is an arithmetic number, because the mean of its divisors is an integer number (3789134712).

Almost surely, 2^66893223824 is an apocalyptic number.

It is an amenable number.

66893223824 is an abundant number, since it is smaller than the sum of its proper divisors (84672164656).

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

66893223824 is a wasteful number, since it uses less digits than its factorization.

66893223824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13889847 (or 13889841 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 53.

The spelling of 66893223824 in words is "sixty-six billion, eight hundred ninety-three million, two hundred twenty-three thousand, eight hundred twenty-four".