66008659 has 4 divisors (see below), whose sum is σ = 66089304. Its totient is φ = 65928016.

The previous prime is 66008627. The next prime is 66008731. The reversal of 66008659 is 95680066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66008659 - 2⁵ = 66008627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66008359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39082 + ... + 40735.

It is an arithmetic number, because the mean of its divisors is an integer number (16522326).

Almost surely, 2^66008659 is an apocalyptic number.

66008659 is a deficient number, since it is larger than the sum of its proper divisors (80645).

66008659 is an equidigital number, since it uses as much as digits as its factorization.

66008659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80644.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 66008659 is about 8124.5713117678. The cubic root of 66008659 is about 404.1416745709.

The spelling of 66008659 in words is "sixty-six million, eight thousand, six hundred fifty-nine".