66504596928 has 672 divisors, whose sum is σ = 231966747648. Its totient is φ = 16756776960.

The previous prime is 66504596911. The next prime is 66504596929. The reversal of 66504596928 is 82969540566.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (672).

It is a super-2 number, since 2×66504596928² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66504596929) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 588536200 + ... + 588536312.

Almost surely, 2^66504596928 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 66504596928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115983373824).

66504596928 is an abundant number, since it is smaller than the sum of its proper divisors (165462150720).

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

66504596928 is a wasteful number, since it uses less digits than its factorization.

66504596928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 60.

The spelling of 66504596928 in words is "sixty-six billion, five hundred four million, five hundred ninety-six thousand, nine hundred twenty-eight".