166641879 has 12 divisors (see below), whose sum is σ = 223389816. Its totient is φ = 110497392.

The previous prime is 166641869. The next prime is 166641883. The reversal of 166641879 is 978146661.

It is a happy number.

It is not a de Polignac number, because 166641879 - 2⁷ = 166641751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166641869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148629 + ... + 149745.

It is an arithmetic number, because the mean of its divisors is an integer number (18615818).

Almost surely, 2^166641879 is an apocalyptic number.

166641879 is a deficient number, since it is larger than the sum of its proper divisors (56747937).

166641879 is an equidigital number, since it uses as much as digits as its factorization.

166641879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1343 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 166641879 is about 12908.9844294584. The cubic root of 166641879 is about 550.2939244391.

The spelling of 166641879 in words is "one hundred sixty-six million, six hundred forty-one thousand, eight hundred seventy-nine".