66360401273 has 2 divisors, whose sum is σ = 66360401274. Its totient is φ = 66360401272.

The previous prime is 66360401189. The next prime is 66360401299. The reversal of 66360401273 is 37210406366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64773813049 + 1586588224 = 254507^2 + 39832^2 .

It is a cyclic number.

It is not a de Polignac number, because 66360401273 - 2¹⁴ = 66360384889 is a prime.

It is a super-2 number, since 2×66360401273² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66360401773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33180200636 + 33180200637.

It is an arithmetic number, because the mean of its divisors is an integer number (33180200637).

Almost surely, 2^66360401273 is an apocalyptic number.

It is an amenable number.

66360401273 is a deficient number, since it is larger than the sum of its proper divisors (1).

66360401273 is an equidigital number, since it uses as much as digits as its factorization.

66360401273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 66360401273 in words is "sixty-six billion, three hundred sixty million, four hundred one thousand, two hundred seventy-three".