166630253 has 2 divisors, whose sum is σ = 166630254. Its totient is φ = 166630252.

The previous prime is 166630249. The next prime is 166630279. The reversal of 166630253 is 352036661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122367844 + 44262409 = 11062^2 + 6653^2 .

It is an emirp because it is prime and its reverse (352036661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166630253 - 2² = 166630249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166630553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83315126 + 83315127.

It is an arithmetic number, because the mean of its divisors is an integer number (83315127).

Almost surely, 2^166630253 is an apocalyptic number.

It is an amenable number.

166630253 is a deficient number, since it is larger than the sum of its proper divisors (1).

166630253 is an equidigital number, since it uses as much as digits as its factorization.

166630253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 166630253 is about 12908.5341150729. The cubic root of 166630253 is about 550.2811268039.

The spelling of 166630253 in words is "one hundred sixty-six million, six hundred thirty thousand, two hundred fifty-three".