668323000 has 64 divisors (see below), whose sum is σ = 1586070720. Its totient is φ = 263536000.

The previous prime is 668322997. The next prime is 668323021. The reversal of 668323000 is 323866.

It is a self number, because there is not a number n which added to its sum of digits gives 668323000.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 66294 + ... + 75706.

It is an arithmetic number, because the mean of its divisors is an integer number (24782355).

Almost surely, 2^668323000 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 668323000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793035360).

668323000 is an abundant number, since it is smaller than the sum of its proper divisors (917747720).

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

668323000 is a wasteful number, since it uses less digits than its factorization.

668323000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9505 (or 9491 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 668323000 is about 25851.9438340717. The cubic root of 668323000 is about 874.3033366296.

Adding to 668323000 its reverse (323866), we get a palindrome (668646866).

The spelling of 668323000 in words is "six hundred sixty-eight million, three hundred twenty-three thousand".