6665214239 has 2 divisors, whose sum is σ = 6665214240. Its totient is φ = 6665214238.

The previous prime is 6665214233. The next prime is 6665214287. The reversal of 6665214239 is 9324125666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6665214239 - 2¹² = 6665210143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6665214239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6665214233) 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, 3332607119 + 3332607120.

It is an arithmetic number, because the mean of its divisors is an integer number (3332607120).

Almost surely, 2^6665214239 is an apocalyptic number.

6665214239 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665214239 is an equidigital number, since it uses as much as digits as its factorization.

6665214239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 44.

The square root of 6665214239 is about 81640.7633416053. The cubic root of 6665214239 is about 1881.9353691587.

The spelling of 6665214239 in words is "six billion, six hundred sixty-five million, two hundred fourteen thousand, two hundred thirty-nine".