6665565 has 16 divisors (see below), whose sum is σ = 10767168. Its totient is φ = 3520896.

The previous prime is 6665539. The next prime is 6665567. The reversal of 6665565 is 5655666.

It is a happy number.

It is not a de Polignac number, because 6665565 - 2⁷ = 6665437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (672948).

Almost surely, 2^6665565 is an apocalyptic number.

It is an amenable number.

6665565 is a deficient number, since it is larger than the sum of its proper divisors (4101603).

6665565 is a wasteful number, since it uses less digits than its factorization.

6665565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268.

The product of its digits is 162000, while the sum is 39.

The square root of 6665565 is about 2581.7755518248. The cubic root of 6665565 is about 188.1968381248.

The spelling of 6665565 in words is "six million, six hundred sixty-five thousand, five hundred sixty-five".