166656211 has 2 divisors, whose sum is σ = 166656212. Its totient is φ = 166656210.

The previous prime is 166656199. The next prime is 166656223. The reversal of 166656211 is 112656661.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (166656199) and next prime (166656223).

It is a cyclic number.

It is not a de Polignac number, because 166656211 - 2¹³ = 166648019 is a prime.

It is not a weakly prime, because it can be changed into another prime (166656311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83328105 + 83328106.

It is an arithmetic number, because the mean of its divisors is an integer number (83328106).

Almost surely, 2^166656211 is an apocalyptic number.

166656211 is a deficient number, since it is larger than the sum of its proper divisors (1).

166656211 is an equidigital number, since it uses as much as digits as its factorization.

166656211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 166656211 is about 12909.5395347781. The cubic root of 166656211 is about 550.3096999582.

The spelling of 166656211 in words is "one hundred sixty-six million, six hundred fifty-six thousand, two hundred eleven".