794816666640 has 240 divisors, whose sum is σ = 2820353110848. Its totient is φ = 207951763968.

The previous prime is 794816666621. The next prime is 794816666687. The reversal of 794816666640 is 46666618497.

It is a tau number, because it is divible by the number of its divisors (240).

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, 644607 + ... + 1416033.

Almost surely, 2^794816666640 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 794816666640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1410176555424).

794816666640 is an abundant number, since it is smaller than the sum of its proper divisors (2025536444208).

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

794816666640 is a wasteful number, since it uses less digits than its factorization.

794816666640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771508 (or 771490 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 794816666640 in words is "seven hundred ninety-four billion, eight hundred sixteen million, six hundred sixty-six thousand, six hundred forty".