68166211 has 4 divisors (see below), whose sum is σ = 70516800. Its totient is φ = 65815624.

The previous prime is 68166199. The next prime is 68166221. The reversal of 68166211 is 11266186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68166211 - 2¹³ = 68158019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68166221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175251 + ... + 1175308.

It is an arithmetic number, because the mean of its divisors is an integer number (17629200).

Almost surely, 2^68166211 is an apocalyptic number.

68166211 is a deficient number, since it is larger than the sum of its proper divisors (2350589).

68166211 is a wasteful number, since it uses less digits than its factorization.

68166211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350588.

The product of its digits is 3456, while the sum is 31.

The square root of 68166211 is about 8256.2831225679. The cubic root of 68166211 is about 408.4977964562.

The spelling of 68166211 in words is "sixty-eight million, one hundred sixty-six thousand, two hundred eleven".