9661111112 has 16 divisors (see below), whose sum is σ = 18117521340. Its totient is φ = 4829772096.

The previous prime is 9661111111. The next prime is 9661111139. The reversal of 9661111112 is 2111111669.

It can be written as a sum of positive squares in 2 ways, for example, as 9361336516 + 299774596 = 96754^2 + 17314^2 .

It is not an unprimeable number, because it can be changed into a prime (9661111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43763 + ... + 145730.

Almost surely, 2^9661111112 is an apocalyptic number.

It is an amenable number.

9661111112 is a deficient number, since it is larger than the sum of its proper divisors (8456410228).

9661111112 is a wasteful number, since it uses less digits than its factorization.

9661111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195872 (or 195868 counting only the distinct ones).

The product of its digits is 648, while the sum is 29.

The square root of 9661111112 is about 98290.9513230999. The cubic root of 9661111112 is about 2129.8173421507.

The spelling of 9661111112 in words is "nine billion, six hundred sixty-one million, one hundred eleven thousand, one hundred twelve".