16656525 has 36 divisors (see below), whose sum is σ = 30071860. Its totient is φ = 8812800.

The previous prime is 16656463. The next prime is 16656533. The reversal of 16656525 is 52565661.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 927369 + 15729156 = 963^2 + 3966^2 .

It is not a de Polignac number, because 16656525 - 2¹⁶ = 16590989 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16656525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 40521 + ... + 40929.

Almost surely, 2^16656525 is an apocalyptic number.

16656525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16656525 is a deficient number, since it is larger than the sum of its proper divisors (13415335).

16656525 is a wasteful number, since it uses less digits than its factorization.

16656525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 598 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 16656525 is about 4081.2406202036. The cubic root of 16656525 is about 255.3846559198.

The spelling of 16656525 in words is "sixteen million, six hundred fifty-six thousand, five hundred twenty-five".