166323481 has 2 divisors, whose sum is σ = 166323482. Its totient is φ = 166323480.

The previous prime is 166323449. The next prime is 166323517. The reversal of 166323481 is 184323661.

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., 163712025 + 2611456 = 12795^2 + 1616^2 .

It is a cyclic number.

It is not a de Polignac number, because 166323481 - 2⁵ = 166323449 is a prime.

It is a super-2 number, since 2×166323481² = 55327000663914722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166326481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83161740 + 83161741.

It is an arithmetic number, because the mean of its divisors is an integer number (83161741).

Almost surely, 2^166323481 is an apocalyptic number.

It is an amenable number.

166323481 is a deficient number, since it is larger than the sum of its proper divisors (1).

166323481 is an equidigital number, since it uses as much as digits as its factorization.

166323481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 166323481 is about 12896.6461143973. The cubic root of 166323481 is about 549.9432238913.

The spelling of 166323481 in words is "one hundred sixty-six million, three hundred twenty-three thousand, four hundred eighty-one".