9866255742 has 192 divisors, whose sum is σ = 26462592000. Its totient is φ = 2648116800.

The previous prime is 9866255719. The next prime is 9866255747. The reversal of 9866255742 is 2475526689.

9866255742 is a `hidden beast` number, since 9 + 8 + 6 + 62 + 5 + 574 + 2 = 666.

9866255742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (7257600) is a multiple of the sum of its prime factors (756).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866255747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17712928 + ... + 17713484.

It is an arithmetic number, because the mean of its divisors is an integer number (137826000).

Almost surely, 2^9866255742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9866255742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13231296000).

9866255742 is an abundant number, since it is smaller than the sum of its proper divisors (16596336258).

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

9866255742 is a wasteful number, since it uses less digits than its factorization.

9866255742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 739 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The square root of 9866255742 is about 99329.0276908014. The cubic root of 9866255742 is about 2144.7867739210.

The spelling of 9866255742 in words is "nine billion, eight hundred sixty-six million, two hundred fifty-five thousand, seven hundred forty-two".