9665816 has 32 divisors (see below), whose sum is σ = 19083600. Its totient is φ = 4583040.

The previous prime is 9665767. The next prime is 9665827. The reversal of 9665816 is 6185669.

9665816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13811 + ... + 14493.

Almost surely, 2^9665816 is an apocalyptic number.

It is an amenable number.

9665816 is a deficient number, since it is larger than the sum of its proper divisors (9417784).

9665816 is a wasteful number, since it uses less digits than its factorization.

9665816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 775 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 9665816 is about 3108.9895464604. The cubic root of 9665816 is about 213.0163021018.

The spelling of 9665816 in words is "nine million, six hundred sixty-five thousand, eight hundred sixteen".