16661396 has 12 divisors (see below), whose sum is σ = 29945748. Its totient is φ = 8105472.

The previous prime is 16661369. The next prime is 16661401. The reversal of 16661396 is 69316661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13104400 + 3556996 = 3620^2 + 1886^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56141 + ... + 56436.

It is an arithmetic number, because the mean of its divisors is an integer number (2495479).

Almost surely, 2^16661396 is an apocalyptic number.

It is an amenable number.

16661396 is a deficient number, since it is larger than the sum of its proper divisors (13284352).

16661396 is a wasteful number, since it uses less digits than its factorization.

16661396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112618 (or 112616 counting only the distinct ones).

The product of its digits is 34992, while the sum is 38.

The square root of 16661396 is about 4081.8373313987. The cubic root of 16661396 is about 255.4095482151.

The spelling of 16661396 in words is "sixteen million, six hundred sixty-one thousand, three hundred ninety-six".