16643108 has 12 divisors (see below), whose sum is σ = 29155980. Its totient is φ = 8312832.

The previous prime is 16643093. The next prime is 16643117. The reversal of 16643108 is 80134661.

It can be written as a sum of positive squares in 2 ways, for example, as 5607424 + 11035684 = 2368^2 + 3322^2 .

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, 4160 + ... + 7112.

It is an arithmetic number, because the mean of its divisors is an integer number (2429665).

Almost surely, 2^16643108 is an apocalyptic number.

It is an amenable number.

16643108 is a deficient number, since it is larger than the sum of its proper divisors (12512872).

16643108 is a wasteful number, since it uses less digits than its factorization.

16643108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366 (or 4364 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 16643108 is about 4079.5965486798. The cubic root of 16643108 is about 255.3160658554.

Adding to 16643108 its reverse (80134661), we get a palindrome (96777769).

The spelling of 16643108 in words is "sixteen million, six hundred forty-three thousand, one hundred eight".