16986685 has 8 divisors (see below), whose sum is σ = 20586456. Its totient is φ = 13454400.

The previous prime is 16986661. The next prime is 16986707. The reversal of 16986685 is 58668961.

It can be written as a sum of positive squares in 4 ways, for example, as 2079364 + 14907321 = 1442^2 + 3861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16986685 - 2⁵ = 16986653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16314 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (2573307).

Almost surely, 2^16986685 is an apocalyptic number.

It is an amenable number.

16986685 is a deficient number, since it is larger than the sum of its proper divisors (3599771).

16986685 is a wasteful number, since it uses less digits than its factorization.

16986685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33743.

The product of its digits is 622080, while the sum is 49.

The square root of 16986685 is about 4121.4906284013. The cubic root of 16986685 is about 257.0610109154.

It can be divided in two parts, 16986 and 685, that added together give a palindrome (17671).

The spelling of 16986685 in words is "sixteen million, nine hundred eighty-six thousand, six hundred eighty-five".