166559849 has 4 divisors (see below), whose sum is σ = 166670736. Its totient is φ = 166448964.

The previous prime is 166559843. The next prime is 166559879. The reversal of 166559849 is 948955661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 948955661 = 29 ⋅32722609.

It is a cyclic number.

It is not a de Polignac number, because 166559849 - 2⁸ = 166559593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166559849.

It is not an unprimeable number, because it can be changed into a prime (166559843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53159 + ... + 56204.

It is an arithmetic number, because the mean of its divisors is an integer number (41667684).

Almost surely, 2^166559849 is an apocalyptic number.

It is an amenable number.

166559849 is a deficient number, since it is larger than the sum of its proper divisors (110887).

166559849 is a wasteful number, since it uses less digits than its factorization.

166559849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110886.

The product of its digits is 2332800, while the sum is 53.

The square root of 166559849 is about 12905.8067938428. The cubic root of 166559849 is about 550.2036149687.

The spelling of 166559849 in words is "one hundred sixty-six million, five hundred fifty-nine thousand, eight hundred forty-nine".