66500565016 has 64 divisors (see below), whose sum is σ = 129852201600. Its totient is φ = 31899598848.

The previous prime is 66500565013. The next prime is 66500565029. The reversal of 66500565016 is 61056500566.

It is a self number, because there is not a number n which added to its sum of digits gives 66500565016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66500565013) 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, 24154296 + ... + 24157048.

It is an arithmetic number, because the mean of its divisors is an integer number (2028940650).

Almost surely, 2^66500565016 is an apocalyptic number.

It is an amenable number.

66500565016 is a deficient number, since it is larger than the sum of its proper divisors (63351636584).

66500565016 is a wasteful number, since it uses less digits than its factorization.

66500565016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908 (or 3904 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 66500565016 in words is "sixty-six billion, five hundred million, five hundred sixty-five thousand, sixteen".