9885661331 has 64 divisors (see below), whose sum is σ = 12986351616. Its totient is φ = 7315660800.

The previous prime is 9885661321. The next prime is 9885661333. The reversal of 9885661331 is 1331665889.

It is a happy number.

9885661331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9885661331 - 2¹⁰ = 9885660307 is a prime.

It is a super-2 number, since 2×9885661331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9885661331.

It is not an unprimeable number, because it can be changed into a prime (9885661333) 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 63 ways as a sum of consecutive naturals, for example, 14688611 + ... + 14689283.

It is an arithmetic number, because the mean of its divisors is an integer number (202911744).

Almost surely, 2^9885661331 is an apocalyptic number.

9885661331 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9885661331 is a deficient number, since it is larger than the sum of its proper divisors (3100690285).

9885661331 is a wasteful number, since it uses less digits than its factorization.

9885661331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its digits is 933120, while the sum is 50.

The square root of 9885661331 is about 99426.6630788744. The cubic root of 9885661331 is about 2146.1920213951.

The spelling of 9885661331 in words is "nine billion, eight hundred eighty-five million, six hundred sixty-one thousand, three hundred thirty-one".