9117136661 has 4 divisors (see below), whose sum is σ = 9119811372. Its totient is φ = 9114461952.

The previous prime is 9117136631. The next prime is 9117136759. The reversal of 9117136661 is 1666317119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4789470436 + 4327666225 = 69206^2 + 65785^2 .

It is a cyclic number.

It is not a de Polignac number, because 9117136661 - 2¹⁸ = 9116874517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9117136621) 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, 1332236 + ... + 1339061.

It is an arithmetic number, because the mean of its divisors is an integer number (2279952843).

Almost surely, 2^9117136661 is an apocalyptic number.

It is an amenable number.

9117136661 is a deficient number, since it is larger than the sum of its proper divisors (2674711).

9117136661 is a wasteful number, since it uses less digits than its factorization.

9117136661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674710.

The product of its digits is 40824, while the sum is 41.

The square root of 9117136661 is about 95483.6984044921. The cubic root of 9117136661 is about 2089.0691780021.

The spelling of 9117136661 in words is "nine billion, one hundred seventeen million, one hundred thirty-six thousand, six hundred sixty-one".