166939684 has 6 divisors (see below), whose sum is σ = 292144454. Its totient is φ = 83469840.

The previous prime is 166939657. The next prime is 166939693. The reversal of 166939684 is 486939661.

166939684 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 157502500 + 9437184 = 12550^2 + 3072^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20867457 + ... + 20867464.

Almost surely, 2^166939684 is an apocalyptic number.

It is an amenable number.

166939684 is a deficient number, since it is larger than the sum of its proper divisors (125204770).

166939684 is a wasteful number, since it uses less digits than its factorization.

166939684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41734925 (or 41734923 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 52.

The square root of 166939684 is about 12920.5140764600. The cubic root of 166939684 is about 550.6215386753.

The spelling of 166939684 in words is "one hundred sixty-six million, nine hundred thirty-nine thousand, six hundred eighty-four".