166630157 has 2 divisors, whose sum is σ = 166630158. Its totient is φ = 166630156.

The previous prime is 166630151. The next prime is 166630159. The reversal of 166630157 is 751036661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144624676 + 22005481 = 12026^2 + 4691^2 .

It is a cyclic number.

It is not a de Polignac number, because 166630157 - 2¹⁴ = 166613773 is a prime.

Together with 166630159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166630151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83315078 + 83315079.

It is an arithmetic number, because the mean of its divisors is an integer number (83315079).

Almost surely, 2^166630157 is an apocalyptic number.

It is an amenable number.

166630157 is a deficient number, since it is larger than the sum of its proper divisors (1).

166630157 is an equidigital number, since it uses as much as digits as its factorization.

166630157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 166630157 is about 12908.5303966021. The cubic root of 166630157 is about 550.2810211268.

The spelling of 166630157 in words is "one hundred sixty-six million, six hundred thirty thousand, one hundred fifty-seven".