65666606611 has 2 divisors, whose sum is σ = 65666606612. Its totient is φ = 65666606610.

The previous prime is 65666606609. The next prime is 65666606617. The reversal of 65666606611 is 11660666656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65666606611 - 2¹ = 65666606609 is a prime.

Together with 65666606609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65666606617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32833303305 + 32833303306.

It is an arithmetic number, because the mean of its divisors is an integer number (32833303306).

Almost surely, 2^65666606611 is an apocalyptic number.

65666606611 is a deficient number, since it is larger than the sum of its proper divisors (1).

65666606611 is an equidigital number, since it uses as much as digits as its factorization.

65666606611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 65666606611 in words is "sixty-five billion, six hundred sixty-six million, six hundred six thousand, six hundred eleven".