666382755841 has 8 divisors (see below), whose sum is σ = 727024100544. Its totient is φ = 605751593520.

The previous prime is 666382755823. The next prime is 666382755917. The reversal of 666382755841 is 148557283666.

It is a happy number.

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 666382755841 - 2⁵ = 666382755809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666382755841.

It is not an unprimeable number, because it can be changed into a prime (666382755811) 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, 2408430 + ... + 2670823.

It is an arithmetic number, because the mean of its divisors is an integer number (90878012568).

Almost surely, 2^666382755841 is an apocalyptic number.

It is an amenable number.

666382755841 is a deficient number, since it is larger than the sum of its proper divisors (60641344703).

666382755841 is a wasteful number, since it uses less digits than its factorization.

666382755841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091191.

The product of its digits is 58060800, while the sum is 61.

The spelling of 666382755841 in words is "six hundred sixty-six billion, three hundred eighty-two million, seven hundred fifty-five thousand, eight hundred forty-one".