6506609 has 4 divisors (see below), whose sum is σ = 6540516. Its totient is φ = 6472704.

The previous prime is 6506587. The next prime is 6506611. The reversal of 6506609 is 9066056.

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 1216609 + 5290000 = 1103^2 + 2300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6506609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6506209) 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, 16664 + ... + 17049.

It is an arithmetic number, because the mean of its divisors is an integer number (1635129).

Almost surely, 2^6506609 is an apocalyptic number.

It is an amenable number.

6506609 is a deficient number, since it is larger than the sum of its proper divisors (33907).

6506609 is a wasteful number, since it uses less digits than its factorization.

6506609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33906.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 6506609 is about 2550.8055590342. The cubic root of 6506609 is about 186.6887881238.

The spelling of 6506609 in words is "six million, five hundred six thousand, six hundred nine".