66825502817632 has 24 divisors (see below), whose sum is σ = 141682917032496. Its totient is φ = 30842539761792.

The previous prime is 66825502817621. The next prime is 66825502817699. The reversal of 66825502817632 is 23671820552866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80319113548 + ... + 80319114379.

It is an arithmetic number, because the mean of its divisors is an integer number (5903454876354).

Almost surely, 2^{66825502817632} is an apocalyptic number.

It is an amenable number.

66825502817632 is an abundant number, since it is smaller than the sum of its proper divisors (74857414214864).

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

66825502817632 is a wasteful number, since it uses less digits than its factorization.

66825502817632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160638227950 (or 160638227942 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 61.

The spelling of 66825502817632 in words is "sixty-six trillion, eight hundred twenty-five billion, five hundred two million, eight hundred seventeen thousand, six hundred thirty-two".