65655332591 has 2 divisors, whose sum is σ = 65655332592. Its totient is φ = 65655332590.

The previous prime is 65655332551. The next prime is 65655332597. The reversal of 65655332591 is 19523355656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65655332591 - 2¹⁸ = 65655070447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65655332597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32827666295 + 32827666296.

It is an arithmetic number, because the mean of its divisors is an integer number (32827666296).

Almost surely, 2^65655332591 is an apocalyptic number.

65655332591 is a deficient number, since it is larger than the sum of its proper divisors (1).

65655332591 is an equidigital number, since it uses as much as digits as its factorization.

65655332591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3645000, while the sum is 50.

The spelling of 65655332591 in words is "sixty-five billion, six hundred fifty-five million, three hundred thirty-two thousand, five hundred ninety-one".