16716171665 has 8 divisors (see below), whose sum is σ = 20061518400. Its totient is φ = 13371529072.

The previous prime is 16716171643. The next prime is 16716171701. The reversal of 16716171665 is 56617161761.

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 16716171665 - 2⁶ = 16716171601 is a prime.

It is a Curzon 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, 122315 + ... + 219984.

It is an arithmetic number, because the mean of its divisors is an integer number (2507689800).

Almost surely, 2^16716171665 is an apocalyptic number.

It is an amenable number.

16716171665 is a deficient number, since it is larger than the sum of its proper divisors (3345346735).

16716171665 is an equidigital number, since it uses as much as digits as its factorization.

16716171665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352071.

The product of its digits is 317520, while the sum is 47.

The spelling of 16716171665 in words is "sixteen billion, seven hundred sixteen million, one hundred seventy-one thousand, six hundred sixty-five".