666335589 has 4 divisors (see below), whose sum is σ = 888447456. Its totient is φ = 444223724.

The previous prime is 666335563. The next prime is 666335597. The reversal of 666335589 is 985533666.

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 666335589 - 2⁸ = 666335333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666335539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111055929 + ... + 111055934.

It is an arithmetic number, because the mean of its divisors is an integer number (222111864).

Almost surely, 2^666335589 is an apocalyptic number.

It is an amenable number.

666335589 is a deficient number, since it is larger than the sum of its proper divisors (222111867).

666335589 is a wasteful number, since it uses less digits than its factorization.

666335589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222111866.

The product of its digits is 3499200, while the sum is 51.

The square root of 666335589 is about 25813.4768870836. The cubic root of 666335589 is about 873.4358292999.

The spelling of 666335589 in words is "six hundred sixty-six million, three hundred thirty-five thousand, five hundred eighty-nine".