668032608171 has 4 divisors (see below), whose sum is σ = 890710144232. Its totient is φ = 445355072112.

The previous prime is 668032608157. The next prime is 668032608197. The reversal of 668032608171 is 171806230866.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 668032608171 - 2¹⁵ = 668032575403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668032608171.

It is not an unprimeable number, because it can be changed into a prime (668032608371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111338768026 + ... + 111338768031.

It is an arithmetic number, because the mean of its divisors is an integer number (222677536058).

Almost surely, 2^668032608171 is an apocalyptic number.

668032608171 is a deficient number, since it is larger than the sum of its proper divisors (222677536061).

668032608171 is a wasteful number, since it uses less digits than its factorization.

668032608171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222677536060.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 668032608171 in words is "six hundred sixty-eight billion, thirty-two million, six hundred eight thousand, one hundred seventy-one".