9866560 has 56 divisors (see below), whose sum is σ = 25639776. Its totient is φ = 3586560.

The previous prime is 9866557. The next prime is 9866561. The reversal of 9866560 is 656689.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2119 + ... + 4921.

Almost surely, 2^9866560 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 9866560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12819888).

9866560 is an abundant number, since it is smaller than the sum of its proper divisors (15773216).

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

9866560 is a wasteful number, since it uses less digits than its factorization.

9866560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831 (or 2821 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 9866560 is about 3141.1080847370. The cubic root of 9866560 is about 214.4808820847.

The spelling of 9866560 in words is "nine million, eight hundred sixty-six thousand, five hundred sixty".