666996793848 has 384 divisors, whose sum is σ = 2334049136640. Its totient is φ = 166993920000.

The previous prime is 666996793831. The next prime is 666996793867. The reversal of 666996793848 is 848397699666.

666996793848 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×666996793848² (a number of 24 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 44161498 + ... + 44176598.

It is an arithmetic number, because the mean of its divisors is an integer number (6078252960).

Almost surely, 2^666996793848 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 666996793848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1167024568320).

666996793848 is an abundant number, since it is smaller than the sum of its proper divisors (1667052342792).

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

666996793848 is a wasteful number, since it uses less digits than its factorization.

666996793848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15419 (or 15412 counting only the distinct ones).

The product of its digits is 5079158784, while the sum is 81.

The spelling of 666996793848 in words is "six hundred sixty-six billion, nine hundred ninety-six million, seven hundred ninety-three thousand, eight hundred forty-eight".