666239590008 has 192 divisors, whose sum is σ = 1900437215040. Its totient is φ = 210449006592.

The previous prime is 666239589997. The next prime is 666239590013. The reversal of 666239590008 is 800095932666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83937016 + ... + 83944952.

It is an arithmetic number, because the mean of its divisors is an integer number (9898110495).

Almost surely, 2^666239590008 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 666239590008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950218607520).

666239590008 is an abundant number, since it is smaller than the sum of its proper divisors (1234197625032).

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

666239590008 is a wasteful number, since it uses less digits than its factorization.

666239590008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438 (or 8431 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 666239590008 in words is "six hundred sixty-six billion, two hundred thirty-nine million, five hundred ninety thousand, eight".