167660217 has 12 divisors (see below), whose sum is σ = 242361444. Its totient is φ = 111687840.

The previous prime is 167660201. The next prime is 167660243. The reversal of 167660217 is 712066761.

It can be written as a sum of positive squares in 2 ways, for example, as 90554256 + 77105961 = 9516^2 + 8781^2 .

It is not a de Polignac number, because 167660217 - 2⁴ = 167660201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (167660257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6667 + ... + 19487.

It is an arithmetic number, because the mean of its divisors is an integer number (20196787).

Almost surely, 2^167660217 is an apocalyptic number.

It is an amenable number.

167660217 is a deficient number, since it is larger than the sum of its proper divisors (74701227).

167660217 is a wasteful number, since it uses less digits than its factorization.

167660217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14280 (or 14277 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 167660217 is about 12948.3673488205. The cubic root of 167660217 is about 551.4125859755.

The spelling of 167660217 in words is "one hundred sixty-seven million, six hundred sixty thousand, two hundred seventeen".