65655775331 has 2 divisors, whose sum is σ = 65655775332. Its totient is φ = 65655775330.

The previous prime is 65655775303. The next prime is 65655775333. The reversal of 65655775331 is 13357755656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65655775331 is a prime.

It is a super-2 number, since 2×65655775331² (a number of 22 digits) contains 22 as substring.

Together with 65655775333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65655775333) 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, 32827887665 + 32827887666.

It is an arithmetic number, because the mean of its divisors is an integer number (32827887666).

Almost surely, 2^65655775331 is an apocalyptic number.

65655775331 is a deficient number, since it is larger than the sum of its proper divisors (1).

65655775331 is an equidigital number, since it uses as much as digits as its factorization.

65655775331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9922500, while the sum is 53.

The spelling of 65655775331 in words is "sixty-five billion, six hundred fifty-five million, seven hundred seventy-five thousand, three hundred thirty-one".