66760361 has 2 divisors, whose sum is σ = 66760362. Its totient is φ = 66760360.

The previous prime is 66760333. The next prime is 66760363. The reversal of 66760361 is 16306766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36675136 + 30085225 = 6056^2 + 5485^2 .

It is a cyclic number.

It is not a de Polignac number, because 66760361 - 2¹⁸ = 66498217 is a prime.

Together with 66760363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66760363) 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, 33380180 + 33380181.

It is an arithmetic number, because the mean of its divisors is an integer number (33380181).

Almost surely, 2^66760361 is an apocalyptic number.

It is an amenable number.

66760361 is a deficient number, since it is larger than the sum of its proper divisors (1).

66760361 is an equidigital number, since it uses as much as digits as its factorization.

66760361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66760361 is about 8170.7013774828. The cubic root of 66760361 is about 405.6700000724.

The spelling of 66760361 in words is "sixty-six million, seven hundred sixty thousand, three hundred sixty-one".