166066253 has 2 divisors, whose sum is σ = 166066254. Its totient is φ = 166066252.

The previous prime is 166066177. The next prime is 166066259. The reversal of 166066253 is 352660661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165431044 + 635209 = 12862^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 166066253 - 2²² = 161871949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166066259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83033126 + 83033127.

It is an arithmetic number, because the mean of its divisors is an integer number (83033127).

Almost surely, 2^166066253 is an apocalyptic number.

It is an amenable number.

166066253 is a deficient number, since it is larger than the sum of its proper divisors (1).

166066253 is an equidigital number, since it uses as much as digits as its factorization.

166066253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 166066253 is about 12886.6695852730. The cubic root of 166066253 is about 549.6595722526.

The spelling of 166066253 in words is "one hundred sixty-six million, sixty-six thousand, two hundred fifty-three".