168213664 has 24 divisors (see below), whose sum is σ = 332029908. Its totient is φ = 83888640.

The previous prime is 168213641. The next prime is 168213677. The reversal of 168213664 is 466312861.

It is a happy number.

168213664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 137077264 + 31136400 = 11708^2 + 5580^2 .

It is an unprimeable number.

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, 6084 + ... + 19324.

Almost surely, 2^168213664 is an apocalyptic number.

It is an amenable number.

168213664 is a deficient number, since it is larger than the sum of its proper divisors (163816244).

168213664 is a wasteful number, since it uses less digits than its factorization.

168213664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13648 (or 13640 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 168213664 is about 12969.7210455738. The cubic root of 168213664 is about 552.0186579145.

The spelling of 168213664 in words is "one hundred sixty-eight million, two hundred thirteen thousand, six hundred sixty-four".