668360196 has 144 divisors (see below), whose sum is σ = 1991808000. Its totient is φ = 188875008.

The previous prime is 668360191. The next prime is 668360221. The reversal of 668360196 is 691063866.

668360196 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668360191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1395085 + ... + 1395563.

It is an arithmetic number, because the mean of its divisors is an integer number (13832000).

Almost surely, 2^668360196 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 668360196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995904000).

668360196 is an abundant number, since it is smaller than the sum of its proper divisors (1323447804).

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

668360196 is a wasteful number, since it uses less digits than its factorization.

668360196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 668360196 is about 25852.6632283794. The cubic root of 668360196 is about 874.3195563235.

The spelling of 668360196 in words is "six hundred sixty-eight million, three hundred sixty thousand, one hundred ninety-six".