66670009 has 8 divisors (see below), whose sum is σ = 76279680. Its totient is φ = 57081696.

The previous prime is 66669997. The next prime is 66670013. The reversal of 66670009 is 90007666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66670009 - 2¹³ = 66661817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66670049) 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 7 ways as a sum of consecutive naturals, for example, 2037 + ... + 11725.

It is an arithmetic number, because the mean of its divisors is an integer number (9534960).

Almost surely, 2^66670009 is an apocalyptic number.

It is an amenable number.

66670009 is a deficient number, since it is larger than the sum of its proper divisors (9609671).

66670009 is an equidigital number, since it uses as much as digits as its factorization.

66670009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10679.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 66670009 is about 8165.1704819924. The cubic root of 66670009 is about 405.4869091738.

The spelling of 66670009 in words is "sixty-six million, six hundred seventy thousand, nine".