668002280 has 64 divisors (see below), whose sum is σ = 1653324480. Its totient is φ = 242890560.

The previous prime is 668002259. The next prime is 668002289. The reversal of 668002280 is 82200866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (668002289) 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 15 ways as a sum of consecutive naturals, for example, 46967 + ... + 59513.

It is an arithmetic number, because the mean of its divisors is an integer number (25833195).

Almost surely, 2^668002280 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 668002280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826662240).

668002280 is an abundant number, since it is smaller than the sum of its proper divisors (985322200).

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

668002280 is a wasteful number, since it uses less digits than its factorization.

668002280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12591 (or 12565 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 668002280 is about 25845.7400745268. The cubic root of 668002280 is about 874.1634584406.

The spelling of 668002280 in words is "six hundred sixty-eight million, two thousand, two hundred eighty".