9965816 has 24 divisors (see below), whose sum is σ = 21737520. Its totient is φ = 4270896.

The previous prime is 9965803. The next prime is 9965819. The reversal of 9965816 is 6185699.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9965819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12320 + ... + 13103.

It is an arithmetic number, because the mean of its divisors is an integer number (905730).

Almost surely, 2^9965816 is an apocalyptic number.

It is an amenable number.

9965816 is an abundant number, since it is smaller than the sum of its proper divisors (11771704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9965816 is a wasteful number, since it uses less digits than its factorization.

9965816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25443 (or 25432 counting only the distinct ones).

The product of its digits is 116640, while the sum is 44.

The square root of 9965816 is about 3156.8680681967. The cubic root of 9965816 is about 215.1976980908.

The spelling of 9965816 in words is "nine million, nine hundred sixty-five thousand, eight hundred sixteen".