66736733706677 has 2 divisors, whose sum is σ = 66736733706678. Its totient is φ = 66736733706676.

The previous prime is 66736733706667. The next prime is 66736733706743. The reversal of 66736733706677 is 77660733763766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50780431829521 + 15956301877156 = 7126039^2 + 3994534^2 .

It is a cyclic number.

It is not a de Polignac number, because 66736733706677 - 2⁴ = 66736733706661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66736733706667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368366853338 + 33368366853339.

It is an arithmetic number, because the mean of its divisors is an integer number (33368366853339).

Almost surely, 2^{66736733706677} is an apocalyptic number.

It is an amenable number.

66736733706677 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736733706677 is an equidigital number, since it uses as much as digits as its factorization.

66736733706677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528663264, while the sum is 74.

The spelling of 66736733706677 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred thirty-three million, seven hundred six thousand, six hundred seventy-seven".