9806660864 has 432 divisors, whose sum is σ = 27402681600. Its totient is φ = 3477196800.

The previous prime is 9806660849. The next prime is 9806660881. The reversal of 9806660864 is 4680666089.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 138121949 + ... + 138122019.

Almost surely, 2^9806660864 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 9806660864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13701340800).

9806660864 is an abundant number, since it is smaller than the sum of its proper divisors (17596020736).

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

9806660864 is a wasteful number, since it uses less digits than its factorization.

9806660864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 53.

The square root of 9806660864 is about 99028.5860951271. The cubic root of 9806660864 is about 2140.4596840551.

The spelling of 9806660864 in words is "nine billion, eight hundred six million, six hundred sixty thousand, eight hundred sixty-four".