9866368512 has 1280 divisors, whose sum is σ = 42237296640. Its totient is φ = 2189721600.

The previous prime is 9866368511. The next prime is 9866368513. The reversal of 9866368512 is 2158636689.

It is a happy number.

9866368512 is a `hidden beast` number, since 9 + 8 + 6 + 63 + 68 + 512 = 666.

It is an interprime number because it is at equal distance from previous prime (9866368511) and next prime (9866368513).

It is a harmonic number, since the harmonic mean of its divisors is an integer.

It is a super-2 number, since 2×9866368512² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (3732480) is a multiple of the sum of its prime divisors (90).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866368511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 318269937 + ... + 318269967.

It is an arithmetic number, because the mean of its divisors is an integer number (32997888).

Almost surely, 2^9866368512 is an apocalyptic number.

9866368512 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9866368512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21118648320).

9866368512 is an abundant number, since it is smaller than the sum of its proper divisors (32370928128).

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

9866368512 is a wasteful number, since it uses less digits than its factorization.

9866368512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 90 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 9866368512 is about 99329.5953480130. The cubic root of 9866368512 is about 2144.7949454331.

The spelling of 9866368512 in words is "nine billion, eight hundred sixty-six million, three hundred sixty-eight thousand, five hundred twelve".