6644165 has 16 divisors (see below), whose sum is σ = 8786880. Its totient is φ = 4782720.

The previous prime is 6644159. The next prime is 6644177. The reversal of 6644165 is 5614466.

It is not a de Polignac number, because 6644165 - 2⁴ = 6644149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5321 + ... + 6449.

It is an arithmetic number, because the mean of its divisors is an integer number (549180).

Almost surely, 2^6644165 is an apocalyptic number.

It is an amenable number.

6644165 is a deficient number, since it is larger than the sum of its proper divisors (2142715).

6644165 is a wasteful number, since it uses less digits than its factorization.

6644165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252.

The product of its digits is 17280, while the sum is 32.

The square root of 6644165 is about 2577.6277853872. The cubic root of 6644165 is about 187.9952183030.

The spelling of 6644165 in words is "six million, six hundred forty-four thousand, one hundred sixty-five".