66136064677 has 2 divisors, whose sum is σ = 66136064678. Its totient is φ = 66136064676.

The previous prime is 66136064651. The next prime is 66136064689. The reversal of 66136064677 is 77646063166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60306589476 + 5829475201 = 245574^2 + 76351^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66136064677 is a prime.

It is a super-2 number, since 2×66136064677² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66136064777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33068032338 + 33068032339.

It is an arithmetic number, because the mean of its divisors is an integer number (33068032339).

Almost surely, 2^66136064677 is an apocalyptic number.

It is an amenable number.

66136064677 is a deficient number, since it is larger than the sum of its proper divisors (1).

66136064677 is an equidigital number, since it uses as much as digits as its factorization.

66136064677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 52.

The spelling of 66136064677 in words is "sixty-six billion, one hundred thirty-six million, sixty-four thousand, six hundred seventy-seven".