166157 has 2 divisors, whose sum is σ = 166158. Its totient is φ = 166156.

The previous prime is 166151. The next prime is 166169. The reversal of 166157 is 751661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148996 + 17161 = 386^2 + 131^2 .

It is an emirp because it is prime and its reverse (751661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166157 - 2⁸ = 165901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166151) 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 as a sum of consecutive naturals, namely, 83078 + 83079.

It is an arithmetic number, because the mean of its divisors is an integer number (83079).

2¹⁶⁶¹⁵⁷ is an apocalyptic number.

It is an amenable number.

166157 is a deficient number, since it is larger than the sum of its proper divisors (1).

166157 is an equidigital number, since it uses as much as digits as its factorization.

166157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 26.

The square root of 166157 is about 407.6236008869. The cubic root of 166157 is about 54.9759674618.

It can be divided in two parts, 166 and 157, that multiplied together give a palindrome (26062).

The spelling of 166157 in words is "one hundred sixty-six thousand, one hundred fifty-seven".