6667172171685 has 16 divisors (see below), whose sum is σ = 11852750527680. Its totient is φ = 3555825158160.

The previous prime is 6667172171683. The next prime is 6667172171731. The reversal of 6667172171685 is 5861712717666.

It is not a de Polignac number, because 6667172171685 - 2¹ = 6667172171683 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6667172171683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24693230131 + ... + 24693230400.

It is an arithmetic number, because the mean of its divisors is an integer number (740796907980).

Almost surely, 2^{6667172171685} is an apocalyptic number.

It is an amenable number.

6667172171685 is a deficient number, since it is larger than the sum of its proper divisors (5185578355995).

6667172171685 is a wasteful number, since it uses less digits than its factorization.

6667172171685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49386460545 (or 49386460539 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 6667172171685 in words is "six trillion, six hundred sixty-seven billion, one hundred seventy-two million, one hundred seventy-one thousand, six hundred eighty-five".