667216380171 has 32 divisors (see below), whose sum is σ = 1027658734848. Its totient is φ = 380559421440.

The previous prime is 667216380161. The next prime is 667216380179. The reversal of 667216380171 is 171083612766.

It is not a de Polignac number, because 667216380171 - 2¹⁵ = 667216347403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667216380171.

It is not an unprimeable number, because it can be changed into a prime (667216380179) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9714276 + ... + 9782718.

It is an arithmetic number, because the mean of its divisors is an integer number (32114335464).

Almost surely, 2^667216380171 is an apocalyptic number.

667216380171 is a deficient number, since it is larger than the sum of its proper divisors (360442354677).

667216380171 is a wasteful number, since it uses less digits than its factorization.

667216380171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85851.

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 667216380171 in words is "six hundred sixty-seven billion, two hundred sixteen million, three hundred eighty thousand, one hundred seventy-one".