668750112 has 72 divisors (see below), whose sum is σ = 1912414140. Its totient is φ = 221667840.

The previous prime is 668750101. The next prime is 668750113. The reversal of 668750112 is 211057866.

668750112 is a `hidden beast` number, since 66 + 87 + 501 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 645363216 + 23386896 = 25404^2 + 4836^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (668750113) 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 in 11 ways as a sum of consecutive naturals, for example, 45714 + ... + 58542.

Almost surely, 2^668750112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668750112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956207070).

668750112 is an abundant number, since it is smaller than the sum of its proper divisors (1243664028).

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

668750112 is a wasteful number, since it uses less digits than its factorization.

668750112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13026 (or 13015 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 668750112 is about 25860.2032474611. The cubic root of 668750112 is about 874.4895469527.

The spelling of 668750112 in words is "six hundred sixty-eight million, seven hundred fifty thousand, one hundred twelve".