65771799450971 has 2 divisors, whose sum is σ = 65771799450972. Its totient is φ = 65771799450970.

The previous prime is 65771799450919. The next prime is 65771799450989. The reversal of 65771799450971 is 17905499717756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65771799450971 - 2³⁸ = 65496921544027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65771799450892 and 65771799450901.

It is not a weakly prime, because it can be changed into another prime (65771799450571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32885899725485 + 32885899725486.

It is an arithmetic number, because the mean of its divisors is an integer number (32885899725486).

Almost surely, 2^{65771799450971} is an apocalyptic number.

65771799450971 is a deficient number, since it is larger than the sum of its proper divisors (1).

65771799450971 is an equidigital number, since it uses as much as digits as its factorization.

65771799450971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050197400, while the sum is 77.

The spelling of 65771799450971 in words is "sixty-five trillion, seven hundred seventy-one billion, seven hundred ninety-nine million, four hundred fifty thousand, nine hundred seventy-one".