6530665 has 4 divisors (see below), whose sum is σ = 7836804. Its totient is φ = 5224528.

The previous prime is 6530663. The next prime is 6530681. The reversal of 6530665 is 5660356.

It is a happy number.

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 1708249 + 4822416 = 1307^2 + 2196^2 .

It is a cyclic number.

It is not a de Polignac number, because 6530665 - 2¹ = 6530663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6530663) 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, 653062 + ... + 653071.

It is an arithmetic number, because the mean of its divisors is an integer number (1959201).

Almost surely, 2^6530665 is an apocalyptic number.

It is an amenable number.

6530665 is a deficient number, since it is larger than the sum of its proper divisors (1306139).

6530665 is a wasteful number, since it uses less digits than its factorization.

6530665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306138.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 6530665 is about 2555.5165818284. The cubic root of 6530665 is about 186.9185781824.

The spelling of 6530665 in words is "six million, five hundred thirty thousand, six hundred sixty-five".