66503775876 has 48 divisors (see below), whose sum is σ = 159523902720. Its totient is φ = 21547883520.

The previous prime is 66503775869. The next prime is 66503775911. The reversal of 66503775876 is 67857730566.

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, 389236 + ... + 533396.

It is an arithmetic number, because the mean of its divisors is an integer number (3323414640).

Almost surely, 2^66503775876 is an apocalyptic number.

It is an amenable number.

66503775876 is an abundant number, since it is smaller than the sum of its proper divisors (93020126844).

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

66503775876 is a wasteful number, since it uses less digits than its factorization.

66503775876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145244 (or 145242 counting only the distinct ones).

The product of its (nonzero) digits is 44452800, while the sum is 60.

The spelling of 66503775876 in words is "sixty-six billion, five hundred three million, seven hundred seventy-five thousand, eight hundred seventy-six".