668296280 has 48 divisors (see below), whose sum is σ = 1571935680. Its totient is φ = 255687872.

The previous prime is 668296273. The next prime is 668296289. The reversal of 668296280 is 82692866.

668296280 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 (668296289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5369 + ... + 36951.

It is an arithmetic number, because the mean of its divisors is an integer number (32748660).

Almost surely, 2^668296280 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 668296280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785967840).

668296280 is an abundant number, since it is smaller than the sum of its proper divisors (903639400).

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

668296280 is a wasteful number, since it uses less digits than its factorization.

668296280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31640 (or 31613 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 668296280 is about 25851.4270399141. The cubic root of 668296280 is about 874.2916847304.

The spelling of 668296280 in words is "six hundred sixty-eight million, two hundred ninety-six thousand, two hundred eighty".