666382755867 has 4 divisors (see below), whose sum is σ = 888510341160. Its totient is φ = 444255170576.

The previous prime is 666382755823. The next prime is 666382755917. The reversal of 666382755867 is 768557283666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666382755867 - 2⁸ = 666382755611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666382355867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111063792642 + ... + 111063792647.

It is an arithmetic number, because the mean of its divisors is an integer number (222127585290).

Almost surely, 2^666382755867 is an apocalyptic number.

666382755867 is a deficient number, since it is larger than the sum of its proper divisors (222127585293).

666382755867 is a wasteful number, since it uses less digits than its factorization.

666382755867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222127585292.

The product of its digits is 609638400, while the sum is 69.

The spelling of 666382755867 in words is "six hundred sixty-six billion, three hundred eighty-two million, seven hundred fifty-five thousand, eight hundred sixty-seven".