665603464853 has 2 divisors, whose sum is σ = 665603464854. Its totient is φ = 665603464852.

The previous prime is 665603464831. The next prime is 665603464861. The reversal of 665603464853 is 358464306566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 662495067844 + 3108397009 = 813938^2 + 55753^2 .

It is a cyclic number.

It is not a de Polignac number, because 665603464853 - 2⁸ = 665603464597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665603463853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332801732426 + 332801732427.

It is an arithmetic number, because the mean of its divisors is an integer number (332801732427).

Almost surely, 2^665603464853 is an apocalyptic number.

It is an amenable number.

665603464853 is a deficient number, since it is larger than the sum of its proper divisors (1).

665603464853 is an equidigital number, since it uses as much as digits as its factorization.

665603464853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37324800, while the sum is 56.

The spelling of 665603464853 in words is "six hundred sixty-five billion, six hundred three million, four hundred sixty-four thousand, eight hundred fifty-three".