163691666864 has 40 divisors (see below), whose sum is σ = 350364241920. Its totient is φ = 73463457600.

The previous prime is 163691666851. The next prime is 163691666867. The reversal of 163691666864 is 468666196361.

It is a junction number, because it is equal to n+sod(n) for n = 163691666797 and 163691666806.

It is not an unprimeable number, because it can be changed into a prime (163691666867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5872592 + ... + 5900399.

It is an arithmetic number, because the mean of its divisors is an integer number (8759106048).

Almost surely, 2^163691666864 is an apocalyptic number.

It is an amenable number.

163691666864 is an abundant number, since it is smaller than the sum of its proper divisors (186672575056).

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

163691666864 is a wasteful number, since it uses less digits than its factorization.

163691666864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11773089 (or 11773083 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 62.

The spelling of 163691666864 in words is "one hundred sixty-three billion, six hundred ninety-one million, six hundred sixty-six thousand, eight hundred sixty-four".