66733945684 has 12 divisors (see below), whose sum is σ = 133467891424. Its totient is φ = 28600262424.

The previous prime is 66733945679. The next prime is 66733945687. The reversal of 66733945684 is 48654933766.

66733945684 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66733945687) 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, 1191677574 + ... + 1191677629.

Almost surely, 2^66733945684 is an apocalyptic number.

It is an amenable number.

66733945684 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66733945684 is a wasteful number, since it uses less digits than its factorization.

66733945684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383355214 (or 2383355212 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 61.

The spelling of 66733945684 in words is "sixty-six billion, seven hundred thirty-three million, nine hundred forty-five thousand, six hundred eighty-four".