166642144 has 12 divisors (see below), whose sum is σ = 328076784. Its totient is φ = 83321056.

The previous prime is 166642129. The next prime is 166642169. The reversal of 166642144 is 441246661.

166642144 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603752 + ... + 2603815.

It is an arithmetic number, because the mean of its divisors is an integer number (27339732).

Almost surely, 2^166642144 is an apocalyptic number.

It is an amenable number.

166642144 is a deficient number, since it is larger than the sum of its proper divisors (161434640).

166642144 is an equidigital number, since it uses as much as digits as its factorization.

166642144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207577 (or 5207569 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 166642144 is about 12908.9946936235. The cubic root of 166642144 is about 550.2942161381.

The spelling of 166642144 in words is "one hundred sixty-six million, six hundred forty-two thousand, one hundred forty-four".