668281004880 has 80 divisors (see below), whose sum is σ = 2072016430080. Its totient is φ = 178178563584.

The previous prime is 668281004863. The next prime is 668281004893. The reversal of 668281004880 is 88400182866.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1229934 + ... + 1687986.

It is an arithmetic number, because the mean of its divisors is an integer number (25900205376).

Almost surely, 2^668281004880 is an apocalyptic number.

668281004880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668281004880 is an abundant number, since it is smaller than the sum of its proper divisors (1403735425200).

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

668281004880 is a wasteful number, since it uses less digits than its factorization.

668281004880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464148 (or 464142 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 51.

The spelling of 668281004880 in words is "six hundred sixty-eight billion, two hundred eighty-one million, four thousand, eight hundred eighty".