9665445969 has 9 divisors (see below), whose sum is σ = 13961625769. Its totient is φ = 6443434020.

The previous prime is 9665445919. The next prime is 9665445991. The reversal of 9665445969 is 9695445669.

The square root of 9665445969 is 98313.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 9665445969 - 2⁷ = 9665445841 is a prime.

It is a super-2 number, since 2×9665445969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9665445919) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 278554 + ... + 311324.

Almost surely, 2^9665445969 is an apocalyptic number.

9665445969 is the 98313-rd square number.

9665445969 is the 49157-th centered octagonal number.

It is an amenable number.

9665445969 is a deficient number, since it is larger than the sum of its proper divisors (4296179800).

9665445969 is an frugal number, since it uses more digits than its factorization.

9665445969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65548 (or 32774 counting only the distinct ones).

The product of its digits is 62985600, while the sum is 63.

The cubic root of 9665445969 is about 2130.1358380604.

The spelling of 9665445969 in words is "nine billion, six hundred sixty-five million, four hundred forty-five thousand, nine hundred sixty-nine".