9996665 has 32 divisors (see below), whose sum is σ = 14376960. Its totient is φ = 6531264.

The previous prime is 9996659. The next prime is 9996667. The reversal of 9996665 is 5666999.

9996665 = T₁₁₄₇ + T₁₁₄₈ + ... + T₁₁₆₁.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9996665 - 2¹² = 9992569 is a prime.

It is a super-2 number, since 2×9996665² = 199866622244450, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9996667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97004 + ... + 97106.

It is an arithmetic number, because the mean of its divisors is an integer number (449280).

Almost surely, 2^9996665 is an apocalyptic number.

It is an amenable number.

9996665 is a deficient number, since it is larger than the sum of its proper divisors (4380295).

9996665 is a wasteful number, since it uses less digits than its factorization.

9996665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its digits is 787320, while the sum is 50.

The square root of 9996665 is about 3161.7503063968. The cubic root of 9996665 is about 215.4195162079.

The spelling of 9996665 in words is "nine million, nine hundred ninety-six thousand, six hundred sixty-five".