9659665 has 4 divisors (see below), whose sum is σ = 11591604. Its totient is φ = 7727728.

The previous prime is 9659653. The next prime is 9659711. The reversal of 9659665 is 5669569.

It is a happy number.

It is a Cunningham number, because it is equal to 3108²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3474496 + 6185169 = 1864^2 + 2487^2 .

It is a cyclic number.

It is not a de Polignac number, because 9659665 - 2⁵ = 9659633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965962 + ... + 965971.

It is an arithmetic number, because the mean of its divisors is an integer number (2897901).

Almost surely, 2^9659665 is an apocalyptic number.

It is an amenable number.

9659665 is a deficient number, since it is larger than the sum of its proper divisors (1931939).

9659665 is a wasteful number, since it uses less digits than its factorization.

9659665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931938.

The product of its digits is 437400, while the sum is 46.

The square root of 9659665 is about 3108.0001608752. Note that the first 3 decimals coincide. The cubic root of 9659665 is about 212.9711070451.

The spelling of 9659665 in words is "nine million, six hundred fifty-nine thousand, six hundred sixty-five".