666666242239 has 8 divisors (see below), whose sum is σ = 714453130080. Its totient is φ = 620446137696.

The previous prime is 666666242201. The next prime is 666666242261. The reversal of 666666242239 is 932242666666.

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 666666242239 - 2⁷ = 666666242111 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 (666666242299) 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, 391694944 + ... + 391696645.

It is an arithmetic number, because the mean of its divisors is an integer number (89306641260).

Almost surely, 2^666666242239 is an apocalyptic number.

666666242239 is a deficient number, since it is larger than the sum of its proper divisors (47786887841).

666666242239 is a wasteful number, since it uses less digits than its factorization.

666666242239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783391649.

The product of its digits is 40310784, while the sum is 58.

The spelling of 666666242239 in words is "six hundred sixty-six billion, six hundred sixty-six million, two hundred forty-two thousand, two hundred thirty-nine".