16671671687 has 8 divisors (see below), whose sum is σ = 18265338000. Its totient is φ = 15091015360.

The previous prime is 16671671683. The next prime is 16671671711. The reversal of 16671671687 is 78617617661.

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 16671671687 - 2² = 16671671683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671671683) 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, 3249812 + ... + 3254937.

It is an arithmetic number, because the mean of its divisors is an integer number (2283167250).

Almost surely, 2^16671671687 is an apocalyptic number.

16671671687 is a deficient number, since it is larger than the sum of its proper divisors (1593666313).

16671671687 is a wasteful number, since it uses less digits than its factorization.

16671671687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6504993.

The product of its digits is 3556224, while the sum is 56.

The spelling of 16671671687 in words is "sixteen billion, six hundred seventy-one million, six hundred seventy-one thousand, six hundred eighty-seven".