6561339 has 4 divisors (see below), whose sum is σ = 8748456. Its totient is φ = 4374224.

The previous prime is 6561319. The next prime is 6561383. The reversal of 6561339 is 9331656.

6561339 is digitally balanced in base 4, 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 a cyclic number.

It is not a de Polignac number, because 6561339 - 2⁵ = 6561307 is a prime.

It is a d-powerful number, because it can be written as 6³ + 5⁷ + 6⁸ + 1 + 3⁹ + 3¹⁴ + 9³ .

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6561319) 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, 1093554 + ... + 1093559.

It is an arithmetic number, because the mean of its divisors is an integer number (2187114).

Almost surely, 2^6561339 is an apocalyptic number.

6561339 is a deficient number, since it is larger than the sum of its proper divisors (2187117).

6561339 is a wasteful number, since it uses less digits than its factorization.

6561339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187116.

The product of its digits is 14580, while the sum is 33.

The square root of 6561339 is about 2561.5110774697. The cubic root of 6561339 is about 187.2107682917.

The spelling of 6561339 in words is "six million, five hundred sixty-one thousand, three hundred thirty-nine".