664032089 has 4 divisors (see below), whose sum is σ = 758893824. Its totient is φ = 569170356.

The previous prime is 664032067. The next prime is 664032107. The reversal of 664032089 is 980230466.

664032089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 980230466 = 2 ⋅490115233.

It is a cyclic number.

It is not a de Polignac number, because 664032089 - 2²⁰ = 662983513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664032029) 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, 47430857 + ... + 47430870.

It is an arithmetic number, because the mean of its divisors is an integer number (189723456).

Almost surely, 2^664032089 is an apocalyptic number.

It is an amenable number.

664032089 is a deficient number, since it is larger than the sum of its proper divisors (94861735).

664032089 is an equidigital number, since it uses as much as digits as its factorization.

664032089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94861734.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 664032089 is about 25768.8200932833. The cubic root of 664032089 is about 872.4281877278.

The spelling of 664032089 in words is "six hundred sixty-four million, thirty-two thousand, eighty-nine".