166245853 has 2 divisors, whose sum is σ = 166245854. Its totient is φ = 166245852.

The previous prime is 166245841. The next prime is 166245883. The reversal of 166245853 is 358542661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132756484 + 33489369 = 11522^2 + 5787^2 .

It is a cyclic number.

It is not a de Polignac number, because 166245853 - 2⁹ = 166245341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166245823) 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, 83122926 + 83122927.

It is an arithmetic number, because the mean of its divisors is an integer number (83122927).

Almost surely, 2^166245853 is an apocalyptic number.

It is an amenable number.

166245853 is a deficient number, since it is larger than the sum of its proper divisors (1).

166245853 is an equidigital number, since it uses as much as digits as its factorization.

166245853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 40.

The square root of 166245853 is about 12893.6361434624. The cubic root of 166245853 is about 549.8576524179.

The spelling of 166245853 in words is "one hundred sixty-six million, two hundred forty-five thousand, eight hundred fifty-three".