668159525488 has 160 divisors (see below), whose sum is σ = 1637702291456. Its totient is φ = 257016582144.

The previous prime is 668159525399. The next prime is 668159525503. The reversal of 668159525488 is 884525951866.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 13937656 + ... + 13985512.

Almost surely, 2^668159525488 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 668159525488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818851145728).

668159525488 is an abundant number, since it is smaller than the sum of its proper divisors (969542765968).

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

668159525488 is a wasteful number, since it uses less digits than its factorization.

668159525488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48151 (or 48145 counting only the distinct ones).

The product of its digits is 165888000, while the sum is 67.

The spelling of 668159525488 in words is "six hundred sixty-eight billion, one hundred fifty-nine million, five hundred twenty-five thousand, four hundred eighty-eight".