665660470759 has 2 divisors, whose sum is σ = 665660470760. Its totient is φ = 665660470758.

The previous prime is 665660470757. The next prime is 665660470763. The reversal of 665660470759 is 957074066566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665660470759 - 2¹ = 665660470757 is a prime.

Together with 665660470757, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 665660470697 and 665660470706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665660470757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332830235379 + 332830235380.

It is an arithmetic number, because the mean of its divisors is an integer number (332830235380).

Almost surely, 2^665660470759 is an apocalyptic number.

665660470759 is a deficient number, since it is larger than the sum of its proper divisors (1).

665660470759 is an equidigital number, since it uses as much as digits as its factorization.

665660470759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57153600, while the sum is 61.

The spelling of 665660470759 in words is "six hundred sixty-five billion, six hundred sixty million, four hundred seventy thousand, seven hundred fifty-nine".