166449523 has 2 divisors, whose sum is σ = 166449524. Its totient is φ = 166449522.

The previous prime is 166449487. The next prime is 166449527. The reversal of 166449523 is 325944661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166449523 - 2⁹ = 166449011 is a prime.

It is not a weakly prime, because it can be changed into another prime (166449527) 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, 83224761 + 83224762.

It is an arithmetic number, because the mean of its divisors is an integer number (83224762).

Almost surely, 2^166449523 is an apocalyptic number.

166449523 is a deficient number, since it is larger than the sum of its proper divisors (1).

166449523 is an equidigital number, since it uses as much as digits as its factorization.

166449523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 166449523 is about 12901.5318082777. The cubic root of 166449523 is about 550.0821067503.

The spelling of 166449523 in words is "one hundred sixty-six million, four hundred forty-nine thousand, five hundred twenty-three".