166644142 has 32 divisors (see below), whose sum is σ = 292976640. Its totient is φ = 69616800.

The previous prime is 166644083. The next prime is 166644161. The reversal of 166644142 is 241446661.

It is a junction number, because it is equal to n+sod(n) for n = 166644098 and 166644107.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 93859 + ... + 95617.

It is an arithmetic number, because the mean of its divisors is an integer number (9155520).

Almost surely, 2^166644142 is an apocalyptic number.

166644142 is a deficient number, since it is larger than the sum of its proper divisors (126332498).

166644142 is a wasteful number, since it uses less digits than its factorization.

166644142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936.

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

The square root of 166644142 is about 12909.0720812923. The cubic root of 166644142 is about 550.2964154286.

The spelling of 166644142 in words is "one hundred sixty-six million, six hundred forty-four thousand, one hundred forty-two".