65920722318879 has 4 divisors (see below), whose sum is σ = 87894296425176. Its totient is φ = 43947148212584.

The previous prime is 65920722318877. The next prime is 65920722318883. The reversal of 65920722318879 is 97881322702956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65920722318879 - 2¹ = 65920722318877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65920722318877) 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, 10986787053144 + ... + 10986787053149.

It is an arithmetic number, because the mean of its divisors is an integer number (21973574106294).

Almost surely, 2^{65920722318879} is an apocalyptic number.

65920722318879 is a deficient number, since it is larger than the sum of its proper divisors (21973574106297).

65920722318879 is a wasteful number, since it uses less digits than its factorization.

65920722318879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21973574106296.

The product of its (nonzero) digits is 182891520, while the sum is 69.

The spelling of 65920722318879 in words is "sixty-five trillion, nine hundred twenty billion, seven hundred twenty-two million, three hundred eighteen thousand, eight hundred seventy-nine".