8661365 has 4 divisors (see below), whose sum is σ = 10393644. Its totient is φ = 6929088.

The previous prime is 8661353. The next prime is 8661383. The reversal of 8661365 is 5631668.

8661365 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.

It can be written as a sum of positive squares in 2 ways, for example, as 966289 + 7695076 = 983^2 + 2774^2 .

It is a cyclic number.

It is not a de Polignac number, because 8661365 - 2²⁰ = 7612789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866132 + ... + 866141.

It is an arithmetic number, because the mean of its divisors is an integer number (2598411).

Almost surely, 2^8661365 is an apocalyptic number.

It is an amenable number.

8661365 is a deficient number, since it is larger than the sum of its proper divisors (1732279).

8661365 is a wasteful number, since it uses less digits than its factorization.

8661365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732278.

The product of its digits is 25920, while the sum is 35.

The square root of 8661365 is about 2943.0197077152. The cubic root of 8661365 is about 205.3661115824.

The spelling of 8661365 in words is "eight million, six hundred sixty-one thousand, three hundred sixty-five".