664192171191 has 8 divisors (see below), whose sum is σ = 885593585664. Its totient is φ = 442792768760.

The previous prime is 664192171147. The next prime is 664192171213. The reversal of 664192171191 is 191171291466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664192171191 - 2¹⁴ = 664192154807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664192171191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664192178191) 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, 635146 + ... + 1315976.

It is an arithmetic number, because the mean of its divisors is an integer number (110699198208).

Almost surely, 2^664192171191 is an apocalyptic number.

664192171191 is a deficient number, since it is larger than the sum of its proper divisors (221401414473).

664192171191 is a wasteful number, since it uses less digits than its factorization.

664192171191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006021.

The product of its digits is 163296, while the sum is 48.

The spelling of 664192171191 in words is "six hundred sixty-four billion, one hundred ninety-two million, one hundred seventy-one thousand, one hundred ninety-one".