8661355 has 4 divisors (see below), whose sum is σ = 10393632. Its totient is φ = 6929080.

The previous prime is 8661353. The next prime is 8661383. The reversal of 8661355 is 5531668.

8661355 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 is not a de Polignac number, because 8661355 - 2¹ = 8661353 is a prime.

It is a Duffinian number.

8661355 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8661355.

It is not an unprimeable number, because it can be changed into a prime (8661353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866131 + ... + 866140.

It is an arithmetic number, because the mean of its divisors is an integer number (2598408).

Almost surely, 2^8661355 is an apocalyptic number.

8661355 is a deficient number, since it is larger than the sum of its proper divisors (1732277).

8661355 is a wasteful number, since it uses less digits than its factorization.

8661355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732276.

The product of its digits is 21600, while the sum is 34.

The square root of 8661355 is about 2943.0180087794. The cubic root of 8661355 is about 205.3660325470.

It can be divided in two parts, 86613 and 55, that added together give a palindrome (86668).

The spelling of 8661355 in words is "eight million, six hundred sixty-one thousand, three hundred fifty-five".