668398202880 has 104 divisors (see below), whose sum is σ = 2138613352752. Its totient is φ = 178239504384.

The previous prime is 668398202869. The next prime is 668398202903. The reversal of 668398202880 is 88202893866.

It is a super-2 number, since 2×668398202880² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 7 ways as a sum of consecutive naturals, for example, 5377999 + ... + 5500878.

Almost surely, 2^668398202880 is an apocalyptic number.

668398202880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668398202880 is an abundant number, since it is smaller than the sum of its proper divisors (1470215149872).

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

668398202880 is a wasteful number, since it uses less digits than its factorization.

668398202880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10878909 (or 10878887 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 60.

The spelling of 668398202880 in words is "six hundred sixty-eight billion, three hundred ninety-eight million, two hundred two thousand, eight hundred eighty".