9801665 has 16 divisors (see below), whose sum is σ = 12171600. Its totient is φ = 7572480.

The previous prime is 9801647. The next prime is 9801677. The reversal of 9801665 is 5661089.

9801665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 339889 + 9461776 = 583^2 + 3076^2 .

It is not a de Polignac number, because 9801665 - 2⁶ = 9801601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27911 + ... + 28259.

It is an arithmetic number, because the mean of its divisors is an integer number (760725).

Almost surely, 2^9801665 is an apocalyptic number.

It is an amenable number.

9801665 is a deficient number, since it is larger than the sum of its proper divisors (2369935).

9801665 is a wasteful number, since it uses less digits than its factorization.

9801665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 9801665 is about 3130.7610895755. The cubic root of 9801665 is about 214.0096146727.

The spelling of 9801665 in words is "nine million, eight hundred one thousand, six hundred sixty-five".