16605625 has 15 divisors (see below), whose sum is σ = 20878473. Its totient is φ = 13203000.

The previous prime is 16605619. The next prime is 16605629. The reversal of 16605625 is 52650661.

The square root of 16605625 is 4075.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 1301881 + 15303744 = 1141^2 + 3912^2 .

It is not a de Polignac number, because 16605625 - 2⁵ = 16605593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16605629) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 101794 + ... + 101956.

Almost surely, 2^16605625 is an apocalyptic number.

16605625 is the 4075-th square number.

16605625 is the 2038-th centered octagonal number.

It is an amenable number.

16605625 is a deficient number, since it is larger than the sum of its proper divisors (4272848).

16605625 is an frugal number, since it uses more digits than its factorization.

16605625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The cubic root of 16605625 is about 255.1242506105.

The spelling of 16605625 in words is "sixteen million, six hundred five thousand, six hundred twenty-five".