65016565997 has 2 divisors, whose sum is σ = 65016565998. Its totient is φ = 65016565996.

The previous prime is 65016565973. The next prime is 65016566059. The reversal of 65016565997 is 79956561056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57554888836 + 7461677161 = 239906^2 + 86381^2 .

It is a cyclic number.

It is not a de Polignac number, because 65016565997 - 2⁸ = 65016565741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65016565907) 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, 32508282998 + 32508282999.

It is an arithmetic number, because the mean of its divisors is an integer number (32508282999).

Almost surely, 2^65016565997 is an apocalyptic number.

It is an amenable number.

65016565997 is a deficient number, since it is larger than the sum of its proper divisors (1).

65016565997 is an equidigital number, since it uses as much as digits as its factorization.

65016565997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15309000, while the sum is 59.

The spelling of 65016565997 in words is "sixty-five billion, sixteen million, five hundred sixty-five thousand, nine hundred ninety-seven".