16664168 has 8 divisors (see below), whose sum is σ = 31245330. Its totient is φ = 8332080.

The previous prime is 16664161. The next prime is 16664189. The reversal of 16664168 is 86146661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 1444 = 4082^2 + 38^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (16664161) by changing a digit.

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 as a sum of consecutive naturals, namely, 1041503 + ... + 1041518.

Almost surely, 2^16664168 is an apocalyptic number.

It is an amenable number.

16664168 is a deficient number, since it is larger than the sum of its proper divisors (14581162).

16664168 is a wasteful number, since it uses less digits than its factorization.

16664168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083027 (or 2083023 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 16664168 is about 4082.1768702495. The cubic root of 16664168 is about 255.4237118143.

The spelling of 16664168 in words is "sixteen million, six hundred sixty-four thousand, one hundred sixty-eight".