666671116007 has 6 divisors (see below), whose sum is σ = 721898309232. Its totient is φ = 615388722312.

The previous prime is 666671115989. The next prime is 666671116081. The reversal of 666671116007 is 700611176666.

It is not a de Polignac number, because 666671116007 - 2⁸ = 666671115751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666671116087) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1972399583 + ... + 1972399920.

It is an arithmetic number, because the mean of its divisors is an integer number (120316384872).

Almost surely, 2^666671116007 is an apocalyptic number.

666671116007 is a deficient number, since it is larger than the sum of its proper divisors (55227193225).

666671116007 is a wasteful number, since it uses less digits than its factorization.

666671116007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944799529 (or 3944799516 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 666671116007 in words is "six hundred sixty-six billion, six hundred seventy-one million, one hundred sixteen thousand, seven".