67171793921 has 8 divisors (see below), whose sum is σ = 67223349984. Its totient is φ = 67120263360.

The previous prime is 67171793903. The next prime is 67171793933. The reversal of 67171793921 is 12939717176.

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 67171793921 - 2²⁶ = 67104685057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67171790921) 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, 10953026 + ... + 10959156.

It is an arithmetic number, because the mean of its divisors is an integer number (8402918748).

Almost surely, 2^67171793921 is an apocalyptic number.

It is an amenable number.

67171793921 is a deficient number, since it is larger than the sum of its proper divisors (51556063).

67171793921 is a wasteful number, since it uses less digits than its factorization.

67171793921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12751.

The product of its digits is 1000188, while the sum is 53.

The spelling of 67171793921 in words is "sixty-seven billion, one hundred seventy-one million, seven hundred ninety-three thousand, nine hundred twenty-one".