66008315709 has 12 divisors (see below), whose sum is σ = 108966108576. Its totient is φ = 37719037512.

The previous prime is 66008315699. The next prime is 66008315753. The reversal of 66008315709 is 90751380066.

It is a happy number.

66008315709 is a `hidden beast` number, since 6 + 600 + 8 + 31 + 5 + 7 + 0 + 9 = 666.

It is not a de Polignac number, because 66008315709 - 2⁸ = 66008315453 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66008315759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523875459 + ... + 523875584.

It is an arithmetic number, because the mean of its divisors is an integer number (9080509048).

Almost surely, 2^66008315709 is an apocalyptic number.

It is an amenable number.

66008315709 is a deficient number, since it is larger than the sum of its proper divisors (42957792867).

66008315709 is a wasteful number, since it uses less digits than its factorization.

66008315709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047751056 (or 1047751053 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 66008315709 in words is "sixty-six billion, eight million, three hundred fifteen thousand, seven hundred nine".