9866165 has 4 divisors (see below), whose sum is σ = 11839404. Its totient is φ = 7892928.

The previous prime is 9866147. The next prime is 9866167. The reversal of 9866165 is 5616689.

9866165 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5616689 = 13 ⋅432053.

It can be written as a sum of positive squares in 2 ways, for example, as 1234321 + 8631844 = 1111^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 9866165 - 2¹⁶ = 9800629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986612 + ... + 986621.

It is an arithmetic number, because the mean of its divisors is an integer number (2959851).

Almost surely, 2^9866165 is an apocalyptic number.

It is an amenable number.

9866165 is a deficient number, since it is larger than the sum of its proper divisors (1973239).

9866165 is a wasteful number, since it uses less digits than its factorization.

9866165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973238.

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

The square root of 9866165 is about 3141.0452082070. The cubic root of 9866165 is about 214.4780198551.

The spelling of 9866165 in words is "nine million, eight hundred sixty-six thousand, one hundred sixty-five".