168320311666 has 16 divisors (see below), whose sum is σ = 273858177600. Its totient is φ = 77127401808.

The previous prime is 168320311657. The next prime is 168320311667. The reversal of 168320311666 is 666113023861.

168320311666 is digitally balanced in base 3, 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 (168320311667) 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, 23283646 + ... + 23290873.

It is an arithmetic number, because the mean of its divisors is an integer number (17116136100).

Almost surely, 2^168320311666 is an apocalyptic number.

168320311666 is a deficient number, since it is larger than the sum of its proper divisors (105537865934).

168320311666 is a wasteful number, since it uses less digits than its factorization.

168320311666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46574673.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 168320311666 in words is "one hundred sixty-eight billion, three hundred twenty million, three hundred eleven thousand, six hundred sixty-six".