66808000671 has 16 divisors (see below), whose sum is σ = 91651972608. Its totient is φ = 43260920000.

The previous prime is 66808000667. The next prime is 66808000673. The reversal of 66808000671 is 17600080866.

66808000671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66808000671 - 2² = 66808000667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66808000673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1168455 + ... + 1224296.

It is an arithmetic number, because the mean of its divisors is an integer number (5728248288).

Almost surely, 2^66808000671 is an apocalyptic number.

66808000671 is a deficient number, since it is larger than the sum of its proper divisors (24843971937).

66808000671 is a wasteful number, since it uses less digits than its factorization.

66808000671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393022.

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 66808000671 in words is "sixty-six billion, eight hundred eight million, six hundred seventy-one", and thus it is an aban number.