2655665 has 4 divisors (see below), whose sum is σ = 3186804. Its totient is φ = 2124528.

The previous prime is 2655661. The next prime is 2655691. The reversal of 2655665 is 5665562.

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 602176 + 2053489 = 776^2 + 1433^2 .

It is a cyclic number.

It is not a de Polignac number, because 2655665 - 2² = 2655661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2655661) 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, 265562 + ... + 265571.

It is an arithmetic number, because the mean of its divisors is an integer number (796701).

2^2655665 is an apocalyptic number.

It is an amenable number.

2655665 is a deficient number, since it is larger than the sum of its proper divisors (531139).

2655665 is an equidigital number, since it uses as much as digits as its factorization.

2655665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531138.

The product of its digits is 54000, while the sum is 35.

The square root of 2655665 is about 1629.6211216108. The cubic root of 2655665 is about 138.4812887702.

The spelling of 2655665 in words is "two million, six hundred fifty-five thousand, six hundred sixty-five".