66704809009 has 8 divisors (see below), whose sum is σ = 67620130560. Its totient is φ = 65791261536.

The previous prime is 66704808977. The next prime is 66704809019. The reversal of 66704809009 is 90090840766.

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

It is a cyclic number.

It is not a de Polignac number, because 66704809009 - 2⁵ = 66704808977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66704809019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367717 + ... + 518290.

It is an arithmetic number, because the mean of its divisors is an integer number (8452516320).

Almost surely, 2^66704809009 is an apocalyptic number.

It is an amenable number.

66704809009 is a deficient number, since it is larger than the sum of its proper divisors (915321551).

66704809009 is an equidigital number, since it uses as much as digits as its factorization.

66704809009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887039.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 66704809009 in words is "sixty-six billion, seven hundred four million, eight hundred nine thousand, nine".