668363800 has 96 divisors (see below), whose sum is σ = 1702234800. Its totient is φ = 242542080.

The previous prime is 668363797. The next prime is 668363809. The reversal of 668363800 is 8363866.

668363800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668363809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151222 + ... + 155578.

Almost surely, 2^668363800 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 668363800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851117400).

668363800 is an abundant number, since it is smaller than the sum of its proper divisors (1033871000).

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

668363800 is a wasteful number, since it uses less digits than its factorization.

668363800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445 (or 4436 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 668363800 is about 25852.7329309688. The cubic root of 668363800 is about 874.3211278524.

The spelling of 668363800 in words is "six hundred sixty-eight million, three hundred sixty-three thousand, eight hundred".