166158253 has 2 divisors, whose sum is σ = 166158254. Its totient is φ = 166158252.

The previous prime is 166158229. The next prime is 166158259. The reversal of 166158253 is 352851661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143089444 + 23068809 = 11962^2 + 4803^2 .

It is a cyclic number.

It is not a de Polignac number, because 166158253 - 2⁹ = 166157741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166158259) 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, 83079126 + 83079127.

It is an arithmetic number, because the mean of its divisors is an integer number (83079127).

Almost surely, 2^166158253 is an apocalyptic number.

It is an amenable number.

166158253 is a deficient number, since it is larger than the sum of its proper divisors (1).

166158253 is an equidigital number, since it uses as much as digits as its factorization.

166158253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 166158253 is about 12890.2386711806. The cubic root of 166158253 is about 549.7610565384.

The spelling of 166158253 in words is "one hundred sixty-six million, one hundred fifty-eight thousand, two hundred fifty-three".