666403336241 has 8 divisors (see below), whose sum is σ = 678583907424. Its totient is φ = 654332996800.

The previous prime is 666403336163. The next prime is 666403336427. The reversal of 666403336241 is 142633304666.

It is a happy number.

666403336241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 666403336241 - 2³⁸ = 391525429297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666403336192 and 666403336201.

It is not an unprimeable number, because it can be changed into a prime (666403036241) 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, 27545735 + ... + 27569916.

It is an arithmetic number, because the mean of its divisors is an integer number (84822988428).

Almost surely, 2^666403336241 is an apocalyptic number.

It is an amenable number.

666403336241 is a deficient number, since it is larger than the sum of its proper divisors (12180571183).

666403336241 is a wasteful number, since it uses less digits than its factorization.

666403336241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55115871.

The product of its (nonzero) digits is 1119744, while the sum is 44.

The spelling of 666403336241 in words is "six hundred sixty-six billion, four hundred three million, three hundred thirty-six thousand, two hundred forty-one".