16665632 has 24 divisors (see below), whose sum is σ = 32961852. Its totient is φ = 8294400.

The previous prime is 16665629. The next prime is 16665637. The reversal of 16665632 is 23656661.

It can be written as a sum of positive squares in 2 ways, for example, as 16032016 + 633616 = 4004^2 + 796^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16665592 and 16665601.

It is not an unprimeable number, because it can be changed into a prime (16665637) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6632 + ... + 8792.

Almost surely, 2^16665632 is an apocalyptic number.

It is an amenable number.

16665632 is a deficient number, since it is larger than the sum of its proper divisors (16296220).

16665632 is a wasteful number, since it uses less digits than its factorization.

16665632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412 (or 2404 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 16665632 is about 4082.3561824025. The cubic root of 16665632 is about 255.4311915230.

The spelling of 16665632 in words is "sixteen million, six hundred sixty-five thousand, six hundred thirty-two".