668245380 has 96 divisors (see below), whose sum is σ = 2054505600. Its totient is φ = 160942080.

The previous prime is 668245379. The next prime is 668245411. The reversal of 668245380 is 83542866.

668245380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100396 + ... + 106844.

It is an arithmetic number, because the mean of its divisors is an integer number (21401100).

Almost surely, 2^668245380 is an apocalyptic number.

668245380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668245380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027252800).

668245380 is an abundant number, since it is smaller than the sum of its proper divisors (1386260220).

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

668245380 is a wasteful number, since it uses less digits than its factorization.

668245380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6629 (or 6627 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 668245380 is about 25850.4425494033. The cubic root of 668245380 is about 874.2694877010.

The spelling of 668245380 in words is "six hundred sixty-eight million, two hundred forty-five thousand, three hundred eighty".