166464559 has 2 divisors, whose sum is σ = 166464560. Its totient is φ = 166464558.

The previous prime is 166464539. The next prime is 166464577. The reversal of 166464559 is 955464661.

166464559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166464559 - 2⁹ = 166464047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166464509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83232279 + 83232280.

It is an arithmetic number, because the mean of its divisors is an integer number (83232280).

Almost surely, 2^166464559 is an apocalyptic number.

166464559 is a deficient number, since it is larger than the sum of its proper divisors (1).

166464559 is an equidigital number, since it uses as much as digits as its factorization.

166464559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 46.

The square root of 166464559 is about 12902.1145166209. The cubic root of 166464559 is about 550.0986699009.

The spelling of 166464559 in words is "one hundred sixty-six million, four hundred sixty-four thousand, five hundred fifty-nine".