665317883 has 2 divisors, whose sum is σ = 665317884. Its totient is φ = 665317882.

The previous prime is 665317879. The next prime is 665317997. The reversal of 665317883 is 388713566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665317883 - 2² = 665317879 is a prime.

It is not a weakly prime, because it can be changed into another prime (665317823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332658941 + 332658942.

It is an arithmetic number, because the mean of its divisors is an integer number (332658942).

Almost surely, 2^665317883 is an apocalyptic number.

665317883 is a deficient number, since it is larger than the sum of its proper divisors (1).

665317883 is an equidigital number, since it uses as much as digits as its factorization.

665317883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 665317883 is about 25793.7566670696. The cubic root of 665317883 is about 872.9909314498.

The spelling of 665317883 in words is "six hundred sixty-five million, three hundred seventeen thousand, eight hundred eighty-three".