2660609 has 8 divisors (see below), whose sum is σ = 3051840. Its totient is φ = 2272176.

The previous prime is 2660597. The next prime is 2660611. The reversal of 2660609 is 9060662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2660609 - 2⁸ = 2660353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2102 + ... + 3120.

It is an arithmetic number, because the mean of its divisors is an integer number (381480).

2^2660609 is an apocalyptic number.

It is an amenable number.

2660609 is a deficient number, since it is larger than the sum of its proper divisors (391231).

2660609 is a wasteful number, since it uses less digits than its factorization.

2660609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 2660609 is about 1631.1373332739. The cubic root of 2660609 is about 138.5671714729.

The spelling of 2660609 in words is "two million, six hundred sixty thousand, six hundred nine".