65806636911349 has 4 divisors (see below), whose sum is σ = 66922003638720. Its totient is φ = 64691270183980.

The previous prime is 65806636911293. The next prime is 65806636911361. The reversal of 65806636911349 is 94311963660856.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65806636911349 - 2¹⁵ = 65806636878581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65806636914349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557683363597 + ... + 557683363714.

It is an arithmetic number, because the mean of its divisors is an integer number (16730500909680).

Almost surely, 2^{65806636911349} is an apocalyptic number.

It is an amenable number.

65806636911349 is a deficient number, since it is larger than the sum of its proper divisors (1115366727371).

65806636911349 is a wasteful number, since it uses less digits than its factorization.

65806636911349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115366727370.

The product of its (nonzero) digits is 151165440, while the sum is 67.

The spelling of 65806636911349 in words is "sixty-five trillion, eight hundred six billion, six hundred thirty-six million, nine hundred eleven thousand, three hundred forty-nine".