667651478211 has 12 divisors (see below), whose sum is σ = 966533326200. Its totient is φ = 444109666560.

The previous prime is 667651478203. The next prime is 667651478231. The reversal of 667651478211 is 112874156766.

It is not a de Polignac number, because 667651478211 - 2³ = 667651478203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667651478231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82605645 + ... + 82613726.

It is an arithmetic number, because the mean of its divisors is an integer number (80544443850).

Almost surely, 2^667651478211 is an apocalyptic number.

667651478211 is a deficient number, since it is larger than the sum of its proper divisors (298881847989).

667651478211 is a wasteful number, since it uses less digits than its factorization.

667651478211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165219826 (or 165219823 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 667651478211 in words is "six hundred sixty-seven billion, six hundred fifty-one million, four hundred seventy-eight thousand, two hundred eleven".