666091362592896 has 256 divisors, whose sum is σ = 1809936584640000. Its totient is φ = 216978556354560.

The previous prime is 666091362592889. The next prime is 666091362592937. The reversal of 666091362592896 is 698295263190666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4106296240 + ... + 4106458448.

It is an arithmetic number, because the mean of its divisors is an integer number (7070064783750).

Almost surely, 2^{666091362592896} 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 666091362592896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904968292320000).

666091362592896 is an abundant number, since it is smaller than the sum of its proper divisors (1143845222047104).

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

666091362592896 is a wasteful number, since it uses less digits than its factorization.

666091362592896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163355 (or 163343 counting only the distinct ones).

The product of its (nonzero) digits is 2720977920, while the sum is 78.

The spelling of 666091362592896 in words is "six hundred sixty-six trillion, ninety-one billion, three hundred sixty-two million, five hundred ninety-two thousand, eight hundred ninety-six".