166666983 has 12 divisors (see below), whose sum is σ = 258504120. Its totient is φ = 95238192.

The previous prime is 166666949. The next prime is 166666987. The reversal of 166666983 is 389666661.

It is not a de Polignac number, because 166666983 - 2⁶ = 166666919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166666987) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 566748 + ... + 567041.

It is an arithmetic number, because the mean of its divisors is an integer number (21542010).

Almost surely, 2^166666983 is an apocalyptic number.

166666983 is a deficient number, since it is larger than the sum of its proper divisors (91837137).

166666983 is a wasteful number, since it uses less digits than its factorization.

166666983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133806 (or 1133799 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The square root of 166666983 is about 12909.9567388896. The cubic root of 166666983 is about 550.3215563188.

The spelling of 166666983 in words is "one hundred sixty-six million, six hundred sixty-six thousand, nine hundred eighty-three".