16686887172005 has 8 divisors (see below), whose sum is σ = 20489945178912. Its totient is φ = 13039056022608.

The previous prime is 16686887171989. The next prime is 16686887172023. The reversal of 16686887172005 is 50027178868661.

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 16686887172005 - 2⁴ = 16686887171989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38806714139 + ... + 38806714568.

It is an arithmetic number, because the mean of its divisors is an integer number (2561243147364).

Almost surely, 2^{16686887172005} is an apocalyptic number.

It is an amenable number.

16686887172005 is a deficient number, since it is larger than the sum of its proper divisors (3803058006907).

16686887172005 is an equidigital number, since it uses as much as digits as its factorization.

16686887172005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77613428755.

The product of its (nonzero) digits is 54190080, while the sum is 65.

The spelling of 16686887172005 in words is "sixteen trillion, six hundred eighty-six billion, eight hundred eighty-seven million, one hundred seventy-two thousand, five".