168433668 has 60 divisors (see below), whose sum is σ = 474201420. Its totient is φ = 51824448.

The previous prime is 168433607. The next prime is 168433679. The reversal of 168433668 is 866334861.

It can be written as a sum of positive squares in 2 ways, for example, as 25583364 + 142850304 = 5058^2 + 11952^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15783 + ... + 24206.

It is an arithmetic number, because the mean of its divisors is an integer number (7903357).

Almost surely, 2^168433668 is an apocalyptic number.

168433668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

168433668 is an abundant number, since it is smaller than the sum of its proper divisors (305767752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168433668 is a wasteful number, since it uses less digits than its factorization.

168433668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40018 (or 40007 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 168433668 is about 12978.1997210707. The cubic root of 168433668 is about 552.2592119069.

The spelling of 168433668 in words is "one hundred sixty-eight million, four hundred thirty-three thousand, six hundred sixty-eight".