65888311997 has 2 divisors, whose sum is σ = 65888311998. Its totient is φ = 65888311996.

The previous prime is 65888311949. The next prime is 65888312027. The reversal of 65888311997 is 79911388856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51281414116 + 14606897881 = 226454^2 + 120859^2 .

It is a cyclic number.

It is not a de Polignac number, because 65888311997 - 2⁶ = 65888311933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65888311297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32944155998 + 32944155999.

It is an arithmetic number, because the mean of its divisors is an integer number (32944155999).

Almost surely, 2^65888311997 is an apocalyptic number.

It is an amenable number.

65888311997 is a deficient number, since it is larger than the sum of its proper divisors (1).

65888311997 is an equidigital number, since it uses as much as digits as its factorization.

65888311997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 65.

The spelling of 65888311997 in words is "sixty-five billion, eight hundred eighty-eight million, three hundred eleven thousand, nine hundred ninety-seven".