166672211 has 2 divisors, whose sum is σ = 166672212. Its totient is φ = 166672210.

The previous prime is 166672201. The next prime is 166672223. The reversal of 166672211 is 112276661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166672211 - 2¹⁰ = 166671187 is a prime.

It is equal to p_9327290 and since 166672211 and 9327290 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (166672201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83336105 + 83336106.

It is an arithmetic number, because the mean of its divisors is an integer number (83336106).

Almost surely, 2^166672211 is an apocalyptic number.

166672211 is a deficient number, since it is larger than the sum of its proper divisors (1).

166672211 is an equidigital number, since it uses as much as digits as its factorization.

166672211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 166672211 is about 12910.1592166789. The cubic root of 166672211 is about 550.3273104099.

The spelling of 166672211 in words is "one hundred sixty-six million, six hundred seventy-two thousand, two hundred eleven".