665006165516 has 24 divisors (see below), whose sum is σ = 1450922543616. Its totient is φ = 259093311120.

The previous prime is 665006165513. The next prime is 665006165569. The reversal of 665006165516 is 615561600566.

665006165516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (665006165513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079555156 + ... + 1079555771.

It is an arithmetic number, because the mean of its divisors is an integer number (60455105984).

Almost surely, 2^665006165516 is an apocalyptic number.

It is an amenable number.

665006165516 is an abundant number, since it is smaller than the sum of its proper divisors (785916378100).

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

665006165516 is a wasteful number, since it uses less digits than its factorization.

665006165516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159110949 (or 2159110947 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 665006165516 in words is "six hundred sixty-five billion, six million, one hundred sixty-five thousand, five hundred sixteen".