166983428 has 6 divisors (see below), whose sum is σ = 292221006. Its totient is φ = 83491712.

The previous prime is 166983403. The next prime is 166983461. The reversal of 166983428 is 824389661.

It can be written as a sum of positive squares in only one way, i.e., 165688384 + 1295044 = 12872^2 + 1138^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20872925 + ... + 20872932.

It is an arithmetic number, because the mean of its divisors is an integer number (48703501).

Almost surely, 2^166983428 is an apocalyptic number.

It is an amenable number.

166983428 is a deficient number, since it is larger than the sum of its proper divisors (125237578).

166983428 is a wasteful number, since it uses less digits than its factorization.

166983428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41745861 (or 41745859 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 166983428 is about 12922.2067774819. The cubic root of 166983428 is about 550.6696284694.

The spelling of 166983428 in words is "one hundred sixty-six million, nine hundred eighty-three thousand, four hundred twenty-eight".