166268849 has 2 divisors, whose sum is σ = 166268850. Its totient is φ = 166268848.

The previous prime is 166268827. The next prime is 166268911. The reversal of 166268849 is 948862661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165379600 + 889249 = 12860^2 + 943^2 .

It is an emirp because it is prime and its reverse (948862661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166268849 - 2²⁴ = 149491633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166268797 and 166268806.

It is not a weakly prime, because it can be changed into another prime (166268749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83134424 + 83134425.

It is an arithmetic number, because the mean of its divisors is an integer number (83134425).

Almost surely, 2^166268849 is an apocalyptic number.

It is an amenable number.

166268849 is a deficient number, since it is larger than the sum of its proper divisors (1).

166268849 is an equidigital number, since it uses as much as digits as its factorization.

166268849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 50.

The square root of 166268849 is about 12894.5278703797. The cubic root of 166268849 is about 549.8830043156.

The spelling of 166268849 in words is "one hundred sixty-six million, two hundred sixty-eight thousand, eight hundred forty-nine".