166616323 has 2 divisors, whose sum is σ = 166616324. Its totient is φ = 166616322.

The previous prime is 166616311. The next prime is 166616399. The reversal of 166616323 is 323616661.

It is a weak prime.

It is an emirp because it is prime and its reverse (323616661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166616323 - 2⁹ = 166615811 is a prime.

It is not a weakly prime, because it can be changed into another prime (166616423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83308161 + 83308162.

It is an arithmetic number, because the mean of its divisors is an integer number (83308162).

Almost surely, 2^166616323 is an apocalyptic number.

166616323 is a deficient number, since it is larger than the sum of its proper divisors (1).

166616323 is an equidigital number, since it uses as much as digits as its factorization.

166616323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 34.

The square root of 166616323 is about 12907.9945382697. The cubic root of 166616323 is about 550.2657921941.

The spelling of 166616323 in words is "one hundred sixty-six million, six hundred sixteen thousand, three hundred twenty-three".