16626625 has 8 divisors (see below), whose sum is σ = 20750184. Its totient is φ = 13301200.

The previous prime is 16626611. The next prime is 16626637. The reversal of 16626625 is 52662661.

It can be written as a sum of positive squares in 4 ways, for example, as 690561 + 15936064 = 831^2 + 3992^2 .

It is not a de Polignac number, because 16626625 - 2⁵ = 16626593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66382 + ... + 66631.

It is an arithmetic number, because the mean of its divisors is an integer number (2593773).

Almost surely, 2^16626625 is an apocalyptic number.

It is an amenable number.

16626625 is a deficient number, since it is larger than the sum of its proper divisors (4123559).

16626625 is an equidigital number, since it uses as much as digits as its factorization.

16626625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133028 (or 133018 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 16626625 is about 4077.5758729912. The cubic root of 16626625 is about 255.2317513797.

The spelling of 16626625 in words is "sixteen million, six hundred twenty-six thousand, six hundred twenty-five".