166320853 has 2 divisors, whose sum is σ = 166320854. Its totient is φ = 166320852.

The previous prime is 166320779. The next prime is 166320899. The reversal of 166320853 is 358023661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95121009 + 71199844 = 9753^2 + 8438^2 .

It is a cyclic number.

It is not a de Polignac number, because 166320853 - 2²¹ = 164223701 is a prime.

It is a super-2 number, since 2×166320853² = 55325252285295218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166320653) 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, 83160426 + 83160427.

It is an arithmetic number, because the mean of its divisors is an integer number (83160427).

Almost surely, 2^166320853 is an apocalyptic number.

It is an amenable number.

166320853 is a deficient number, since it is larger than the sum of its proper divisors (1).

166320853 is an equidigital number, since it uses as much as digits as its factorization.

166320853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 166320853 is about 12896.5442270400. The cubic root of 166320853 is about 549.9403274103.

The spelling of 166320853 in words is "one hundred sixty-six million, three hundred twenty thousand, eight hundred fifty-three".