9876665 has 4 divisors (see below), whose sum is σ = 11852004. Its totient is φ = 7901328.

The previous prime is 9876641. The next prime is 9876673. The reversal of 9876665 is 5666789.

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 1605289 + 8271376 = 1267^2 + 2876^2 .

It is a cyclic number.

It is not a de Polignac number, because 9876665 - 2¹⁴ = 9860281 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an unprimeable number.

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, 987662 + ... + 987671.

It is an arithmetic number, because the mean of its divisors is an integer number (2963001).

Almost surely, 2^9876665 is an apocalyptic number.

It is an amenable number.

9876665 is a deficient number, since it is larger than the sum of its proper divisors (1975339).

9876665 is a wasteful number, since it uses less digits than its factorization.

9876665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975338.

The product of its digits is 544320, while the sum is 47.

The square root of 9876665 is about 3142.7161819038. The cubic root of 9876665 is about 214.5540784784.

The spelling of 9876665 in words is "nine million, eight hundred seventy-six thousand, six hundred sixty-five".