166241191 has 2 divisors, whose sum is σ = 166241192. Its totient is φ = 166241190.

The previous prime is 166241161. The next prime is 166241197. The reversal of 166241191 is 191142661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166241191 - 2¹³ = 166232999 is a prime.

It is a super-2 number, since 2×166241191² = 55272267170196962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166241197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83120595 + 83120596.

It is an arithmetic number, because the mean of its divisors is an integer number (83120596).

Almost surely, 2^166241191 is an apocalyptic number.

166241191 is a deficient number, since it is larger than the sum of its proper divisors (1).

166241191 is an equidigital number, since it uses as much as digits as its factorization.

166241191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 166241191 is about 12893.4553553343. The cubic root of 166241191 is about 549.8525125195.

The spelling of 166241191 in words is "one hundred sixty-six million, two hundred forty-one thousand, one hundred ninety-one".