9665613 has 18 divisors (see below), whose sum is σ = 14470794. Its totient is φ = 6216672.

The previous prime is 9665609. The next prime is 9665641. The reversal of 9665613 is 3165669.

9665613 is a `hidden beast` number, since 96 + 6 + 561 + 3 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2196324 + 7469289 = 1482^2 + 2733^2 .

It is not a de Polignac number, because 9665613 - 2² = 9665609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6931 + ... + 8207.

It is an arithmetic number, because the mean of its divisors is an integer number (803933).

Almost surely, 2^9665613 is an apocalyptic number.

It is an amenable number.

9665613 is a deficient number, since it is larger than the sum of its proper divisors (4805181).

9665613 is a wasteful number, since it uses less digits than its factorization.

9665613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341 (or 1309 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 9665613 is about 3108.9568990258. The cubic root of 9665613 is about 213.0148108461.

It can be divided in two parts, 96656 and 13, that added together give a palindrome (96669).

The spelling of 9665613 in words is "nine million, six hundred sixty-five thousand, six hundred thirteen".