9665599161 has 8 divisors (see below), whose sum is σ = 13201794144. Its totient is φ = 6286568480.

The previous prime is 9665599159. The next prime is 9665599187. The reversal of 9665599161 is 1619955669.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9665599161 - 2¹ = 9665599159 is a prime.

It is a super-2 number, since 2×9665599161² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9665599661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39290931 + ... + 39291176.

It is an arithmetic number, because the mean of its divisors is an integer number (1650224268).

Almost surely, 2^9665599161 is an apocalyptic number.

It is an amenable number.

9665599161 is a deficient number, since it is larger than the sum of its proper divisors (3536194983).

9665599161 is a wasteful number, since it uses less digits than its factorization.

9665599161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78582151.

The product of its digits is 3936600, while the sum is 57.

The square root of 9665599161 is about 98313.7791003886. The cubic root of 9665599161 is about 2130.1470918280.

The spelling of 9665599161 in words is "nine billion, six hundred sixty-five million, five hundred ninety-nine thousand, one hundred sixty-one".