66009089 has 4 divisors (see below), whose sum is σ = 66027456. Its totient is φ = 65990724.

The previous prime is 66009077. The next prime is 66009101. The reversal of 66009089 is 98090066.

66009089 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.

It is an interprime number because it is at equal distance from previous prime (66009077) and next prime (66009101).

It is a cyclic number.

It is not a de Polignac number, because 66009089 - 2²⁰ = 64960513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66009019) 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, 1829 + ... + 11634.

It is an arithmetic number, because the mean of its divisors is an integer number (16506864).

Almost surely, 2^66009089 is an apocalyptic number.

It is an amenable number.

66009089 is a deficient number, since it is larger than the sum of its proper divisors (18367).

66009089 is a wasteful number, since it uses less digits than its factorization.

66009089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18366.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 66009089 is about 8124.5977746594. The cubic root of 66009089 is about 404.1425521352.

The spelling of 66009089 in words is "sixty-six million, nine thousand, eighty-nine".