66964329659 has 16 divisors (see below), whose sum is σ = 67871274240. Its totient is φ = 66064546080.

The previous prime is 66964329629. The next prime is 66964329661. The reversal of 66964329659 is 95692346966.

It is a cyclic number.

It is not a de Polignac number, because 66964329659 - 2²⁴ = 66947552443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66964329595 and 66964329604.

It is not an unprimeable number, because it can be changed into a prime (66964329629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18052697 + ... + 18056405.

It is an arithmetic number, because the mean of its divisors is an integer number (4241954640).

Almost surely, 2^66964329659 is an apocalyptic number.

66964329659 is a deficient number, since it is larger than the sum of its proper divisors (906944581).

66964329659 is a wasteful number, since it uses less digits than its factorization.

66964329659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4610.

The product of its digits is 113374080, while the sum is 65.

The spelling of 66964329659 in words is "sixty-six billion, nine hundred sixty-four million, three hundred twenty-nine thousand, six hundred fifty-nine".