16671688668872 has 16 divisors (see below), whose sum is σ = 32337327159900. Its totient is φ = 8048401426240.

The previous prime is 16671688668851. The next prime is 16671688668907. The reversal of 16671688668872 is 27886688617661.

16671688668872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16280530987396 + 391157681476 = 4034914^2 + 625426^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35930363279 + ... + 35930363742.

Almost surely, 2^{16671688668872} is an apocalyptic number.

It is an amenable number.

16671688668872 is a deficient number, since it is larger than the sum of its proper divisors (15665638491028).

16671688668872 is a wasteful number, since it uses less digits than its factorization.

16671688668872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71860727056 (or 71860727052 counting only the distinct ones).

The product of its digits is 3121348608, while the sum is 80.

The spelling of 16671688668872 in words is "sixteen trillion, six hundred seventy-one billion, six hundred eighty-eight million, six hundred sixty-eight thousand, eight hundred seventy-two".