65665278067 has 2 divisors, whose sum is σ = 65665278068. Its totient is φ = 65665278066.

The previous prime is 65665278053. The next prime is 65665278071. The reversal of 65665278067 is 76087256656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65665278067 - 2³¹ = 63517794419 is a prime.

It is not a weakly prime, because it can be changed into another prime (65665278037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32832639033 + 32832639034.

It is an arithmetic number, because the mean of its divisors is an integer number (32832639034).

Almost surely, 2^65665278067 is an apocalyptic number.

65665278067 is a deficient number, since it is larger than the sum of its proper divisors (1).

65665278067 is an equidigital number, since it uses as much as digits as its factorization.

65665278067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 65665278067 in words is "sixty-five billion, six hundred sixty-five million, two hundred seventy-eight thousand, sixty-seven".