16851664 has 20 divisors (see below), whose sum is σ = 32803456. Its totient is φ = 8386272.

The previous prime is 16851649. The next prime is 16851683. The reversal of 16851664 is 46615861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207 + ... + 5929.

Almost surely, 2^16851664 is an apocalyptic number.

It is an amenable number.

16851664 is a deficient number, since it is larger than the sum of its proper divisors (15951792).

16851664 is a wasteful number, since it uses less digits than its factorization.

16851664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4954 (or 4948 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 16851664 is about 4105.0778311745. The cubic root of 16851664 is about 256.3781033885.

The spelling of 16851664 in words is "sixteen million, eight hundred fifty-one thousand, six hundred sixty-four".