666931124089 has 4 divisors (see below), whose sum is σ = 667014094080. Its totient is φ = 666848154100.

The previous prime is 666931124029. The next prime is 666931124113. The reversal of 666931124089 is 980421139666.

It is a happy number.

666931124089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 666931124089 - 2⁷ = 666931123961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666931124009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41472937 + ... + 41489014.

It is an arithmetic number, because the mean of its divisors is an integer number (166753523520).

Almost surely, 2^666931124089 is an apocalyptic number.

It is an amenable number.

666931124089 is a deficient number, since it is larger than the sum of its proper divisors (82969991).

666931124089 is an equidigital number, since it uses as much as digits as its factorization.

666931124089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82969990.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 666931124089 in words is "six hundred sixty-six billion, nine hundred thirty-one million, one hundred twenty-four thousand, eighty-nine".