66563127776 has 48 divisors (see below), whose sum is σ = 133287437808. Its totient is φ = 32713113600.

The previous prime is 66563127737. The next prime is 66563127793. The reversal of 66563127776 is 67772136566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2977376 + ... + 2999648.

It is an arithmetic number, because the mean of its divisors is an integer number (2776821621).

Almost surely, 2^66563127776 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 66563127776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66643718904).

66563127776 is an abundant number, since it is smaller than the sum of its proper divisors (66724310032).

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

66563127776 is a wasteful number, since it uses less digits than its factorization.

66563127776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23875 (or 23867 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 56.

The spelling of 66563127776 in words is "sixty-six billion, five hundred sixty-three million, one hundred twenty-seven thousand, seven hundred seventy-six".