6661589 has 4 divisors (see below), whose sum is σ = 7267200. Its totient is φ = 6055980.

The previous prime is 6661583. The next prime is 6661597. The reversal of 6661589 is 9851666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6661589 - 2¹⁶ = 6596053 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 (6661583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302789 + ... + 302810.

It is an arithmetic number, because the mean of its divisors is an integer number (1816800).

Almost surely, 2^6661589 is an apocalyptic number.

It is an amenable number.

6661589 is a deficient number, since it is larger than the sum of its proper divisors (605611).

6661589 is a wasteful number, since it uses less digits than its factorization.

6661589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605610.

The product of its digits is 77760, while the sum is 41.

The square root of 6661589 is about 2581.0054242485. The cubic root of 6661589 is about 188.1594109671.

The spelling of 6661589 in words is "six million, six hundred sixty-one thousand, five hundred eighty-nine".