166489562 has 4 divisors (see below), whose sum is σ = 249734346. Its totient is φ = 83244780.

The previous prime is 166489537. The next prime is 166489597. The reversal of 166489562 is 265984661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 265984661 = 3373 ⋅78857.

It can be written as a sum of positive squares in only one way, i.e., 150577441 + 15912121 = 12271^2 + 3989^2 .

It is an unprimeable number.

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, 41622389 + ... + 41622392.

Almost surely, 2^166489562 is an apocalyptic number.

166489562 is a deficient number, since it is larger than the sum of its proper divisors (83244784).

166489562 is an equidigital number, since it uses as much as digits as its factorization.

166489562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83244783.

The product of its digits is 622080, while the sum is 47.

The square root of 166489562 is about 12903.0834299403. The cubic root of 166489562 is about 550.1262101544.

The spelling of 166489562 in words is "one hundred sixty-six million, four hundred eighty-nine thousand, five hundred sixty-two".