66735677 has 2 divisors, whose sum is σ = 66735678. Its totient is φ = 66735676.

The previous prime is 66735661. The next prime is 66735689. The reversal of 66735677 is 77653766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66406201 + 329476 = 8149^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 66735677 - 2⁴ = 66735661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66735637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367838 + 33367839.

It is an arithmetic number, because the mean of its divisors is an integer number (33367839).

Almost surely, 2^66735677 is an apocalyptic number.

It is an amenable number.

66735677 is a deficient number, since it is larger than the sum of its proper divisors (1).

66735677 is an equidigital number, since it uses as much as digits as its factorization.

66735677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 47.

The square root of 66735677 is about 8169.1907187922. The cubic root of 66735677 is about 405.6199963849.

The spelling of 66735677 in words is "sixty-six million, seven hundred thirty-five thousand, six hundred seventy-seven".