66873277 has 2 divisors, whose sum is σ = 66873278. Its totient is φ = 66873276.

The previous prime is 66873253. The next prime is 66873281. The reversal of 66873277 is 77237866.

66873277 is nontrivially palindromic in base 6.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 27258841 = 6294^2 + 5221^2 .

It is a cyclic number.

It is not a de Polignac number, because 66873277 - 2¹⁵ = 66840509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66873377) 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, 33436638 + 33436639.

It is an arithmetic number, because the mean of its divisors is an integer number (33436639).

Almost surely, 2^66873277 is an apocalyptic number.

It is an amenable number.

66873277 is a deficient number, since it is larger than the sum of its proper divisors (1).

66873277 is an equidigital number, since it uses as much as digits as its factorization.

66873277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 46.

The square root of 66873277 is about 8177.6082689256. The cubic root of 66873277 is about 405.8985829823.

The spelling of 66873277 in words is "sixty-six million, eight hundred seventy-three thousand, two hundred seventy-seven".