6557165 has 4 divisors (see below), whose sum is σ = 7868604. Its totient is φ = 5245728.

The previous prime is 6557153. The next prime is 6557167. The reversal of 6557165 is 5617556.

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 978121 + 5579044 = 989^2 + 2362^2 .

It is a cyclic number.

It is not a de Polignac number, because 6557165 - 2⁶ = 6557101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557167) 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, 655712 + ... + 655721.

It is an arithmetic number, because the mean of its divisors is an integer number (1967151).

Almost surely, 2^6557165 is an apocalyptic number.

It is an amenable number.

6557165 is a deficient number, since it is larger than the sum of its proper divisors (1311439).

6557165 is a wasteful number, since it uses less digits than its factorization.

6557165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311438.

The product of its digits is 31500, while the sum is 35.

The square root of 6557165 is about 2560.6961943971. The cubic root of 6557165 is about 187.1710617875.

The spelling of 6557165 in words is "six million, five hundred fifty-seven thousand, one hundred sixty-five".