66613040676 has 216 divisors, whose sum is σ = 208932534720. Its totient is φ = 17521650432.

The previous prime is 66613040647. The next prime is 66613040707. The reversal of 66613040676 is 67604031666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17842506 + ... + 17846238.

Almost surely, 2^66613040676 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 66613040676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104466267360).

66613040676 is an abundant number, since it is smaller than the sum of its proper divisors (142319494044).

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

66613040676 is a wasteful number, since it uses less digits than its factorization.

66613040676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195 (or 4177 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 66613040676 in words is "sixty-six billion, six hundred thirteen million, forty thousand, six hundred seventy-six".