166412249 has 2 divisors, whose sum is σ = 166412250. Its totient is φ = 166412248.

The previous prime is 166412227. The next prime is 166412251. The reversal of 166412249 is 942214661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153760000 + 12652249 = 12400^2 + 3557^2 .

It is an emirp because it is prime and its reverse (942214661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166412249 is a prime.

Together with 166412251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166412219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83206124 + 83206125.

It is an arithmetic number, because the mean of its divisors is an integer number (83206125).

Almost surely, 2^166412249 is an apocalyptic number.

It is an amenable number.

166412249 is a deficient number, since it is larger than the sum of its proper divisors (1).

166412249 is an equidigital number, since it uses as much as digits as its factorization.

166412249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 166412249 is about 12900.0871702481. The cubic root of 166412249 is about 550.0410426672.

It can be divided in two parts, 166412 and 249, that added together give a palindrome (166661).

The spelling of 166412249 in words is "one hundred sixty-six million, four hundred twelve thousand, two hundred forty-nine".