9965656025 has 48 divisors (see below), whose sum is σ = 13774118400. Its totient is φ = 7102771200.

The previous prime is 9965655991. The next prime is 9965656031. The reversal of 9965656025 is 5206565699.

9965656025 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9965656025 - 2¹⁰ = 9965655001 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4522574 + ... + 4524776.

It is an arithmetic number, because the mean of its divisors is an integer number (286960800).

Almost surely, 2^9965656025 is an apocalyptic number.

It is an amenable number.

9965656025 is a deficient number, since it is larger than the sum of its proper divisors (3808462375).

9965656025 is a wasteful number, since it uses less digits than its factorization.

9965656025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706 (or 2701 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 53.

The square root of 9965656025 is about 99828.1324326965. The cubic root of 9965656025 is about 2151.9654660675.

The spelling of 9965656025 in words is "nine billion, nine hundred sixty-five million, six hundred fifty-six thousand, twenty-five".