666111309716 has 24 divisors (see below), whose sum is σ = 1217959068480. Its totient is φ = 318160668672.

The previous prime is 666111309709. The next prime is 666111309733. The reversal of 666111309716 is 617903111666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4636886 + ... + 4778381.

It is an arithmetic number, because the mean of its divisors is an integer number (50748294520).

Almost surely, 2^666111309716 is an apocalyptic number.

It is an amenable number.

666111309716 is a deficient number, since it is larger than the sum of its proper divisors (551847758764).

666111309716 is a wasteful number, since it uses less digits than its factorization.

666111309716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416063 (or 9416061 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 666111309716 in words is "six hundred sixty-six billion, one hundred eleven million, three hundred nine thousand, seven hundred sixteen".