65775171349 has 2 divisors, whose sum is σ = 65775171350. Its totient is φ = 65775171348.

The previous prime is 65775171323. The next prime is 65775171361. The reversal of 65775171349 is 94317157756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48374923249 + 17400248100 = 219943^2 + 131910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65775171349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65775171349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65775171389) 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, 32887585674 + 32887585675.

It is an arithmetic number, because the mean of its divisors is an integer number (32887585675).

Almost surely, 2^65775171349 is an apocalyptic number.

It is an amenable number.

65775171349 is a deficient number, since it is larger than the sum of its proper divisors (1).

65775171349 is an equidigital number, since it uses as much as digits as its factorization.

65775171349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5556600, while the sum is 55.

The spelling of 65775171349 in words is "sixty-five billion, seven hundred seventy-five million, one hundred seventy-one thousand, three hundred forty-nine".