668259239 has 8 divisors (see below), whose sum is σ = 707969808. Its totient is φ = 628593280.

The previous prime is 668259217. The next prime is 668259283. The reversal of 668259239 is 932952866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 668259239 - 2¹² = 668255143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668259439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22649 + ... + 43005.

It is an arithmetic number, because the mean of its divisors is an integer number (88496226).

Almost surely, 2^668259239 is an apocalyptic number.

668259239 is a deficient number, since it is larger than the sum of its proper divisors (39710569).

668259239 is a wasteful number, since it uses less digits than its factorization.

668259239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22305.

The product of its digits is 1399680, while the sum is 50.

The square root of 668259239 is about 25850.7106091883. The cubic root of 668259239 is about 874.2755315972.

The spelling of 668259239 in words is "six hundred sixty-eight million, two hundred fifty-nine thousand, two hundred thirty-nine".