166559941 has 4 divisors (see below), whose sum is σ = 170433472. Its totient is φ = 162686412.

The previous prime is 166559929. The next prime is 166559959. The reversal of 166559941 is 149955661.

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.

It is a cyclic number.

It is not a de Polignac number, because 166559941 - 2²¹ = 164462789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166559891 and 166559900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166559971) 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, 1936701 + ... + 1936786.

It is an arithmetic number, because the mean of its divisors is an integer number (42608368).

Almost surely, 2^166559941 is an apocalyptic number.

It is an amenable number.

166559941 is a deficient number, since it is larger than the sum of its proper divisors (3873531).

166559941 is an equidigital number, since it uses as much as digits as its factorization.

166559941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873530.

The product of its digits is 291600, while the sum is 46.

The square root of 166559941 is about 12905.8103581294. The cubic root of 166559941 is about 550.2037162711.

The spelling of 166559941 in words is "one hundred sixty-six million, five hundred fifty-nine thousand, nine hundred forty-one".