665214853 has 2 divisors, whose sum is σ = 665214854. Its totient is φ = 665214852.

The previous prime is 665214799. The next prime is 665214863. The reversal of 665214853 is 358412566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611968644 + 53246209 = 24738^2 + 7297^2 .

It is a cyclic number.

It is not a de Polignac number, because 665214853 - 2¹⁷ = 665083781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665214863) 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, 332607426 + 332607427.

It is an arithmetic number, because the mean of its divisors is an integer number (332607427).

Almost surely, 2^665214853 is an apocalyptic number.

It is an amenable number.

665214853 is a deficient number, since it is larger than the sum of its proper divisors (1).

665214853 is an equidigital number, since it uses as much as digits as its factorization.

665214853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 40.

The square root of 665214853 is about 25791.7594010180. The cubic root of 665214853 is about 872.9458658246.

The spelling of 665214853 in words is "six hundred sixty-five million, two hundred fourteen thousand, eight hundred fifty-three".