16681668021712 has 40 divisors (see below), whose sum is σ = 32354189011872. Its totient is φ = 8332201718400.

The previous prime is 16681668021703. The next prime is 16681668021719. The reversal of 16681668021712 is 21712086618661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681668021719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160316262 + ... + 160420282.

Almost surely, 2^{16681668021712} is an apocalyptic number.

It is an amenable number.

16681668021712 is a deficient number, since it is larger than the sum of its proper divisors (15672520990160).

16681668021712 is a wasteful number, since it uses less digits than its factorization.

16681668021712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114307 (or 114301 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 16681668021712 in words is "sixteen trillion, six hundred eighty-one billion, six hundred sixty-eight million, twenty-one thousand, seven hundred twelve".