667232870217 has 4 divisors (see below), whose sum is σ = 889643826960. Its totient is φ = 444821913476.

The previous prime is 667232870191. The next prime is 667232870231. The reversal of 667232870217 is 712078232766.

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 667232870217 - 2¹² = 667232866121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667232870217.

It is not an unprimeable number, because it can be changed into a prime (667232870917) 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, 111205478367 + ... + 111205478372.

It is an arithmetic number, because the mean of its divisors is an integer number (222410956740).

Almost surely, 2^667232870217 is an apocalyptic number.

It is an amenable number.

667232870217 is a deficient number, since it is larger than the sum of its proper divisors (222410956743).

667232870217 is a wasteful number, since it uses less digits than its factorization.

667232870217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222410956742.

The product of its (nonzero) digits is 2370816, while the sum is 51.

The spelling of 667232870217 in words is "six hundred sixty-seven billion, two hundred thirty-two million, eight hundred seventy thousand, two hundred seventeen".