16643066 has 24 divisors (see below), whose sum is σ = 27762420. Its totient is φ = 7476480.

The previous prime is 16643023. The next prime is 16643087. The reversal of 16643066 is 66034661.

It can be written as a sum of positive squares in 2 ways, for example, as 15768841 + 874225 = 3971^2 + 935^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23120 + ... + 23828.

Almost surely, 2^16643066 is an apocalyptic number.

16643066 is a deficient number, since it is larger than the sum of its proper divisors (11119354).

16643066 is a wasteful number, since it uses less digits than its factorization.

16643066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 16643066 is about 4079.5914011087. The cubic root of 16643066 is about 255.3158510861.

The spelling of 16643066 in words is "sixteen million, six hundred forty-three thousand, sixty-six".