66481635704 has 64 divisors (see below), whose sum is σ = 137015128800. Its totient is φ = 29990822400.

The previous prime is 66481635697. The next prime is 66481635707. The reversal of 66481635704 is 40753618466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66481635707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7293902 + ... + 7303010.

Almost surely, 2^66481635704 is an apocalyptic number.

It is an amenable number.

66481635704 is an abundant number, since it is smaller than the sum of its proper divisors (70533493096).

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

66481635704 is a wasteful number, since it uses less digits than its factorization.

66481635704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744 (or 9740 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 66481635704 in words is "sixty-six billion, four hundred eighty-one million, six hundred thirty-five thousand, seven hundred four".