665560562071 has 2 divisors, whose sum is σ = 665560562072. Its totient is φ = 665560562070.

The previous prime is 665560562059. The next prime is 665560562113. The reversal of 665560562071 is 170265065566.

665560562071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665560562071 - 2⁹ = 665560561559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665560562041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332780281035 + 332780281036.

It is an arithmetic number, because the mean of its divisors is an integer number (332780281036).

Almost surely, 2^665560562071 is an apocalyptic number.

665560562071 is a deficient number, since it is larger than the sum of its proper divisors (1).

665560562071 is an equidigital number, since it uses as much as digits as its factorization.

665560562071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 665560562071 in words is "six hundred sixty-five billion, five hundred sixty million, five hundred sixty-two thousand, seventy-one".