66674036673737 has 2 divisors, whose sum is σ = 66674036673738. Its totient is φ = 66674036673736.

The previous prime is 66674036673733. The next prime is 66674036673787. The reversal of 66674036673737 is 73737663047666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41772579375241 + 24901457298496 = 6463171^2 + 4990136^2 .

It is a cyclic number.

It is not a de Polignac number, because 66674036673737 - 2² = 66674036673733 is a prime.

It is not a weakly prime, because it can be changed into another prime (66674036673733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33337018336868 + 33337018336869.

It is an arithmetic number, because the mean of its divisors is an integer number (33337018336869).

Almost surely, 2^{66674036673737} is an apocalyptic number.

It is an amenable number.

66674036673737 is a deficient number, since it is larger than the sum of its proper divisors (1).

66674036673737 is an equidigital number, since it uses as much as digits as its factorization.

66674036673737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016379008, while the sum is 71.

The spelling of 66674036673737 in words is "sixty-six trillion, six hundred seventy-four billion, thirty-six million, six hundred seventy-three thousand, seven hundred thirty-seven".