665660470711 has 2 divisors, whose sum is σ = 665660470712. Its totient is φ = 665660470710.

The previous prime is 665660470703. The next prime is 665660470757. The reversal of 665660470711 is 117074066566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665660470711 - 2³ = 665660470703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665660473711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332830235355 + 332830235356.

It is an arithmetic number, because the mean of its divisors is an integer number (332830235356).

Almost surely, 2^665660470711 is an apocalyptic number.

665660470711 is a deficient number, since it is larger than the sum of its proper divisors (1).

665660470711 is an equidigital number, since it uses as much as digits as its factorization.

665660470711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 665660470711 in words is "six hundred sixty-five billion, six hundred sixty million, four hundred seventy thousand, seven hundred eleven".