665052043 has 2 divisors, whose sum is σ = 665052044. Its totient is φ = 665052042.

The previous prime is 665052029. The next prime is 665052049. The reversal of 665052043 is 340250566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665052043 - 2⁹ = 665051531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665051996 and 665052014.

It is not a weakly prime, because it can be changed into another prime (665052049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332526021 + 332526022.

It is an arithmetic number, because the mean of its divisors is an integer number (332526022).

Almost surely, 2^665052043 is an apocalyptic number.

665052043 is a deficient number, since it is larger than the sum of its proper divisors (1).

665052043 is an equidigital number, since it uses as much as digits as its factorization.

665052043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 665052043 is about 25788.6029672024. The cubic root of 665052043 is about 872.8746427643.

The spelling of 665052043 in words is "six hundred sixty-five million, fifty-two thousand, forty-three".