667111138807 has 4 divisors (see below), whose sum is σ = 679698141480. Its totient is φ = 654524136136.

The previous prime is 667111138763. The next prime is 667111138847. The reversal of 667111138807 is 708831111766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 708831111766 = 2 ⋅354415555883.

It is a cyclic number.

It is not a de Polignac number, because 667111138807 - 2³⁵ = 632751400439 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667111138847) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6293501257 + ... + 6293501362.

It is an arithmetic number, because the mean of its divisors is an integer number (169924535370).

Almost surely, 2^667111138807 is an apocalyptic number.

667111138807 is a deficient number, since it is larger than the sum of its proper divisors (12587002673).

667111138807 is a wasteful number, since it uses less digits than its factorization.

667111138807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12587002672.

The product of its (nonzero) digits is 338688, while the sum is 49.

The spelling of 667111138807 in words is "six hundred sixty-seven billion, one hundred eleven million, one hundred thirty-eight thousand, eight hundred seven".