166852817 has 2 divisors, whose sum is σ = 166852818. Its totient is φ = 166852816.

The previous prime is 166852799. The next prime is 166852871. The reversal of 166852817 is 718258661.

It is a happy number.

Together with next prime (166852871) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94789696 + 72063121 = 9736^2 + 8489^2 .

It is a cyclic number.

It is not a de Polignac number, because 166852817 - 2⁸ = 166852561 is a prime.

It is not a weakly prime, because it can be changed into another prime (166852897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83426408 + 83426409.

It is an arithmetic number, because the mean of its divisors is an integer number (83426409).

Almost surely, 2^166852817 is an apocalyptic number.

It is an amenable number.

166852817 is a deficient number, since it is larger than the sum of its proper divisors (1).

166852817 is an equidigital number, since it uses as much as digits as its factorization.

166852817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 166852817 is about 12917.1520467942. The cubic root of 166852817 is about 550.5260168703.

The spelling of 166852817 in words is "one hundred sixty-six million, eight hundred fifty-two thousand, eight hundred seventeen".