166669983 has 24 divisors (see below), whose sum is σ = 252390528. Its totient is φ = 105784272.

The previous prime is 166669973. The next prime is 166669991. The reversal of 166669983 is 389966661.

It is not a de Polignac number, because 166669983 - 2⁴ = 166669967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166669913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45216 + ... + 48762.

It is an arithmetic number, because the mean of its divisors is an integer number (10516272).

Almost surely, 2^166669983 is an apocalyptic number.

166669983 is a deficient number, since it is larger than the sum of its proper divisors (85720545).

166669983 is a wasteful number, since it uses less digits than its factorization.

166669983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803 (or 3800 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 166669983 is about 12910.0729277568. The cubic root of 166669983 is about 550.3248582220.

The spelling of 166669983 in words is "one hundred sixty-six million, six hundred sixty-nine thousand, nine hundred eighty-three".