66513276659 has 2 divisors, whose sum is σ = 66513276660. Its totient is φ = 66513276658.

The previous prime is 66513276647. The next prime is 66513276689. The reversal of 66513276659 is 95667231566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66513276659 is a prime.

It is not a weakly prime, because it can be changed into another prime (66513276619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33256638329 + 33256638330.

It is an arithmetic number, because the mean of its divisors is an integer number (33256638330).

Almost surely, 2^66513276659 is an apocalyptic number.

66513276659 is a deficient number, since it is larger than the sum of its proper divisors (1).

66513276659 is an equidigital number, since it uses as much as digits as its factorization.

66513276659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12247200, while the sum is 56.

The spelling of 66513276659 in words is "sixty-six billion, five hundred thirteen million, two hundred seventy-six thousand, six hundred fifty-nine".