9866664480 has 48 divisors (see below), whose sum is σ = 31079994624. Its totient is φ = 2631110400.

The previous prime is 9866664397. The next prime is 9866664487. The reversal of 9866664480 is 844666689.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 9866664480.

It is not an unprimeable number, because it can be changed into a prime (9866664487) 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, 10277296 + ... + 10278255.

It is an arithmetic number, because the mean of its divisors is an integer number (647499888).

Almost surely, 2^9866664480 is an apocalyptic number.

It is an amenable number.

9866664480 is an abundant number, since it is smaller than the sum of its proper divisors (21213330144).

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

9866664480 is a wasteful number, since it uses less digits than its factorization.

9866664480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20555569 (or 20555561 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 57.

The square root of 9866664480 is about 99331.0851647157. The cubic root of 9866664480 is about 2144.8163914975.

The spelling of 9866664480 in words is "nine billion, eight hundred sixty-six million, six hundred sixty-four thousand, four hundred eighty".