66317692708 has 12 divisors (see below), whose sum is σ = 116105554012. Its totient is φ = 33144677280.

The previous prime is 66317692697. The next prime is 66317692709. The reversal of 66317692708 is 80729671366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14548701924 + 51768990784 = 120618^2 + 227528^2 .

It is a super-2 number, since 2×66317692708² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66317692709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3531735 + ... + 3550462.

Almost surely, 2^66317692708 is an apocalyptic number.

It is an amenable number.

66317692708 is a deficient number, since it is larger than the sum of its proper divisors (49787861304).

66317692708 is a wasteful number, since it uses less digits than its factorization.

66317692708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7084542 (or 7084540 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 66317692708 in words is "sixty-six billion, three hundred seventeen million, six hundred ninety-two thousand, seven hundred eight".