66608895696 has 80 divisors (see below), whose sum is σ = 196734455808. Its totient is φ = 19023408000.

The previous prime is 66608895679. The next prime is 66608895697. The reversal of 66608895696 is 69659880666.

It is a self number, because there is not a number n which added to its sum of digits gives 66608895696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66608895697) 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, 818281 + ... + 895991.

Almost surely, 2^66608895696 is an apocalyptic number.

It is an amenable number.

66608895696 is an abundant number, since it is smaller than the sum of its proper divisors (130125560112).

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

66608895696 is a wasteful number, since it uses less digits than its factorization.

66608895696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80280 (or 80274 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 69.

The spelling of 66608895696 in words is "sixty-six billion, six hundred eight million, eight hundred ninety-five thousand, six hundred ninety-six".