66524445136 has 80 divisors (see below), whose sum is σ = 136930521600. Its totient is φ = 31260902400.

The previous prime is 66524445121. The next prime is 66524445161. The reversal of 66524445136 is 63154442566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2589796 + ... + 2615356.

It is an arithmetic number, because the mean of its divisors is an integer number (1711631520).

Almost surely, 2^66524445136 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 66524445136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68465260800).

66524445136 is an abundant number, since it is smaller than the sum of its proper divisors (70406076464).

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

66524445136 is a wasteful number, since it uses less digits than its factorization.

66524445136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25748 (or 25742 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 46.

The spelling of 66524445136 in words is "sixty-six billion, five hundred twenty-four million, four hundred forty-five thousand, one hundred thirty-six".