65703878780831 has 2 divisors, whose sum is σ = 65703878780832. Its totient is φ = 65703878780830.

The previous prime is 65703878780707. The next prime is 65703878780873. The reversal of 65703878780831 is 13808787830756.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65703878780831 is a prime.

It is a super-2 number, since 2×65703878780831² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65703878780231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32851939390415 + 32851939390416.

It is an arithmetic number, because the mean of its divisors is an integer number (32851939390416).

Almost surely, 2^{65703878780831} is an apocalyptic number.

65703878780831 is a deficient number, since it is larger than the sum of its proper divisors (1).

65703878780831 is an equidigital number, since it uses as much as digits as its factorization.

65703878780831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 379330560, while the sum is 71.

The spelling of 65703878780831 in words is "sixty-five trillion, seven hundred three billion, eight hundred seventy-eight million, seven hundred eighty thousand, eight hundred thirty-one".