66733333992 has 384 divisors, whose sum is σ = 211891680000. Its totient is φ = 18802409472.

The previous prime is 66733333987. The next prime is 66733334009. The reversal of 66733333992 is 29933333766.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 86778984 + ... + 86779752.

It is an arithmetic number, because the mean of its divisors is an integer number (551801250).

Almost surely, 2^66733333992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66733333992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105945840000).

66733333992 is an abundant number, since it is smaller than the sum of its proper divisors (145158346008).

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

66733333992 is a wasteful number, since it uses less digits than its factorization.

66733333992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 978 counting only the distinct ones).

The product of its digits is 9920232, while the sum is 54.

The spelling of 66733333992 in words is "sixty-six billion, seven hundred thirty-three million, three hundred thirty-three thousand, nine hundred ninety-two".