9866551200 has 288 divisors, whose sum is σ = 35170873920. Its totient is φ = 2382643200.

The previous prime is 9866551193. The next prime is 9866551223. The reversal of 9866551200 is 21556689.

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, 8896246 + ... + 8897354.

It is an arithmetic number, because the mean of its divisors is an integer number (122121090).

Almost surely, 2^9866551200 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 9866551200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17585436960).

9866551200 is an abundant number, since it is smaller than the sum of its proper divisors (25304322720).

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

9866551200 is a wasteful number, since it uses less digits than its factorization.

9866551200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 9866551200 is about 99330.5149488313. The cubic root of 9866551200 is about 2144.8081831939.

The spelling of 9866551200 in words is "nine billion, eight hundred sixty-six million, five hundred fifty-one thousand, two hundred".