668237112 has 24 divisors (see below), whose sum is σ = 1809809040. Its totient is φ = 222745680.

The previous prime is 668237083. The next prime is 668237113. The reversal of 668237112 is 211732866.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668237113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4640464 + ... + 4640607.

It is an arithmetic number, because the mean of its divisors is an integer number (75408710).

Almost surely, 2^668237112 is an apocalyptic number.

It is an amenable number.

668237112 is an abundant number, since it is smaller than the sum of its proper divisors (1141571928).

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

668237112 is a wasteful number, since it uses less digits than its factorization.

668237112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9281083 (or 9281076 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 668237112 is about 25850.2826290159. The cubic root of 668237112 is about 874.2658819946.

Adding to 668237112 its reverse (211732866), we get a palindrome (879969978).

The spelling of 668237112 in words is "six hundred sixty-eight million, two hundred thirty-seven thousand, one hundred twelve".