9665839225 has 45 divisors (see below), whose sum is σ = 14210604507. Its totient is φ = 6502947360.

The previous prime is 9665839213. The next prime is 9665839231. The reversal of 9665839225 is 5229385669.

It is a happy number.

The square root of 9665839225 is 98315.

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

It can be written as a sum of positive squares in 7 ways, for example, as 1980161001 + 7685678224 = 44499^2 + 87668^2 .

It is not a de Polignac number, because 9665839225 - 2⁵ = 9665839193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 182374299 + ... + 182374351.

Almost surely, 2^9665839225 is an apocalyptic number.

9665839225 is the 98315-th square number.

9665839225 is the 49158-th centered octagonal number.

It is an amenable number.

9665839225 is a deficient number, since it is larger than the sum of its proper divisors (4544765282).

9665839225 is an frugal number, since it uses more digits than its factorization.

9665839225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 65 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 55.

The cubic root of 9665839225 is about 2130.1647271340.

The spelling of 9665839225 in words is "nine billion, six hundred sixty-five million, eight hundred thirty-nine thousand, two hundred twenty-five".