16678672 has 20 divisors (see below), whose sum is σ = 32399836. Its totient is φ = 8317440.

The previous prime is 16678663. The next prime is 16678679. The reversal of 16678672 is 27687661.

It can be written as a sum of positive squares in 2 ways, for example, as 12418576 + 4260096 = 3524^2 + 2064^2 .

It is not an unprimeable number, because it can be changed into a prime (16678679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6172 + ... + 8452.

Almost surely, 2^16678672 is an apocalyptic number.

It is an amenable number.

16678672 is a deficient number, since it is larger than the sum of its proper divisors (15721164).

16678672 is a wasteful number, since it uses less digits than its factorization.

16678672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746 (or 2740 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 16678672 is about 4083.9529869968. The cubic root of 16678672 is about 255.4977947453.

The spelling of 16678672 in words is "sixteen million, six hundred seventy-eight thousand, six hundred seventy-two".