6664589 has 4 divisors (see below), whose sum is σ = 6677856. Its totient is φ = 6651324.

The previous prime is 6664571. The next prime is 6664607. The reversal of 6664589 is 9854666.

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 an interprime number because it is at equal distance from previous prime (6664571) and next prime (6664607).

It is a cyclic number.

It is not a de Polignac number, because 6664589 - 2¹⁶ = 6599053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664529) 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, 5849 + ... + 6894.

It is an arithmetic number, because the mean of its divisors is an integer number (1669464).

Almost surely, 2^6664589 is an apocalyptic number.

It is an amenable number.

6664589 is a deficient number, since it is larger than the sum of its proper divisors (13267).

6664589 is a wasteful number, since it uses less digits than its factorization.

6664589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13266.

The product of its digits is 311040, while the sum is 44.

The square root of 6664589 is about 2581.5865276996. The cubic root of 6664589 is about 188.1876521529.

The spelling of 6664589 in words is "six million, six hundred sixty-four thousand, five hundred eighty-nine".