16685036687 has 16 divisors (see below), whose sum is σ = 18631979520. Its totient is φ = 14810040000.

The previous prime is 16685036677. The next prime is 16685036701. The reversal of 16685036687 is 78663058661.

It is a happy number.

16685036687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16685036687 is a prime.

It is a super-4 number, since 4×16685036687⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16685036647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1849187 + ... + 1858187.

It is an arithmetic number, because the mean of its divisors is an integer number (1164498720).

Almost surely, 2^16685036687 is an apocalyptic number.

16685036687 is a deficient number, since it is larger than the sum of its proper divisors (1946942833).

16685036687 is a wasteful number, since it uses less digits than its factorization.

16685036687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12974.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 16685036687 in words is "sixteen billion, six hundred eighty-five million, thirty-six thousand, six hundred eighty-seven".