668873023488 has 280 divisors, whose sum is σ = 2002848355992. Its totient is φ = 222443864064.

The previous prime is 668873023487. The next prime is 668873023529. The reversal of 668873023488 is 884320378866.

668873023488 is a `hidden beast` number, since 6 + 6 + 88 + 73 + 0 + 2 + 3 + 488 = 666.

It is a super-2 number, since 2×668873023488² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668873023487) 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 19 ways as a sum of consecutive naturals, for example, 382868631 + ... + 382870377.

Almost surely, 2^668873023488 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 668873023488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001424177996).

668873023488 is an abundant number, since it is smaller than the sum of its proper divisors (1333975332504).

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

668873023488 is an equidigital number, since it uses as much as digits as its factorization.

668873023488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362 (or 2329 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 63.

The spelling of 668873023488 in words is "six hundred sixty-eight billion, eight hundred seventy-three million, twenty-three thousand, four hundred eighty-eight".