16678925 has 12 divisors (see below), whose sum is σ = 21022836. Its totient is φ = 13123200.

The previous prime is 16678919. The next prime is 16678939. The reversal of 16678925 is 52987661.

It can be written as a sum of positive squares in 6 ways, for example, as 405769 + 16273156 = 637^2 + 4034^2 .

It is not a de Polignac number, because 16678925 - 2⁶ = 16678861 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 11 ways as a sum of consecutive naturals, for example, 3944 + ... + 6993.

It is an arithmetic number, because the mean of its divisors is an integer number (1751903).

Almost surely, 2^16678925 is an apocalyptic number.

It is an amenable number.

16678925 is a deficient number, since it is larger than the sum of its proper divisors (4343911).

16678925 is a wasteful number, since it uses less digits than its factorization.

16678925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11008 (or 11003 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 16678925 is about 4083.9839617707. The cubic root of 16678925 is about 255.4990866271.

The spelling of 16678925 in words is "sixteen million, six hundred seventy-eight thousand, nine hundred twenty-five".