9958665 has 16 divisors (see below), whose sum is σ = 16027200. Its totient is φ = 5280192.

The previous prime is 9958639. The next prime is 9958681. The reversal of 9958665 is 5668599.

9958665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9958665 - 2⁵ = 9958633 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 831 + ... + 4539.

It is an arithmetic number, because the mean of its divisors is an integer number (1001700).

Almost surely, 2^9958665 is an apocalyptic number.

It is an amenable number.

9958665 is a deficient number, since it is larger than the sum of its proper divisors (6068535).

9958665 is a wasteful number, since it uses less digits than its factorization.

9958665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896.

The product of its digits is 583200, while the sum is 48.

The square root of 9958665 is about 3155.7352550555. The cubic root of 9958665 is about 215.1462138651.

The spelling of 9958665 in words is "nine million, nine hundred fifty-eight thousand, six hundred sixty-five".