667876438873 has 4 divisors (see below), whose sum is σ = 763287358720. Its totient is φ = 572465519028.

The previous prime is 667876438847. The next prime is 667876438891. The reversal of 667876438873 is 378834678766.

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 667876438873 - 2¹⁷ = 667876307801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667876438796 and 667876438805.

It is not an unprimeable number, because it can be changed into a prime (667876438673) 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, 47705459913 + ... + 47705459926.

It is an arithmetic number, because the mean of its divisors is an integer number (190821839680).

Almost surely, 2^667876438873 is an apocalyptic number.

It is an amenable number.

667876438873 is a deficient number, since it is larger than the sum of its proper divisors (95410919847).

667876438873 is an equidigital number, since it uses as much as digits as its factorization.

667876438873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95410919846.

The product of its digits is 1365590016, while the sum is 73.

The spelling of 667876438873 in words is "six hundred sixty-seven billion, eight hundred seventy-six million, four hundred thirty-eight thousand, eight hundred seventy-three".