666666666673 has 12 divisors (see below), whose sum is σ = 775524667440. Its totient is φ = 571417914312.

The previous prime is 666666666671. The next prime is 666666666733. The reversal of 666666666673 is 376666666666.

It is not a de Polignac number, because 666666666673 - 2¹ = 666666666671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666666666671) 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 11 ways as a sum of consecutive naturals, for example, 3682798 + ... + 3859576.

It is an arithmetic number, because the mean of its divisors is an integer number (64627055620).

Almost surely, 2^666666666673 is an apocalyptic number.

It is an amenable number.

666666666673 is a deficient number, since it is larger than the sum of its proper divisors (108858000767).

666666666673 is a wasteful number, since it uses less digits than its factorization.

666666666673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253756 (or 253749 counting only the distinct ones).

The product of its digits is 1269789696, while the sum is 70.

The spelling of 666666666673 in words is "six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy-three".