166623982 has 16 divisors (see below), whose sum is σ = 286248960. Its totient is φ = 71258328.

The previous prime is 166623973. The next prime is 166623991. The reversal of 166623982 is 289326661.

It is an interprime number because it is at equal distance from previous prime (166623973) and next prime (166623991).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5718 + ... + 19129.

It is an arithmetic number, because the mean of its divisors is an integer number (17890560).

Almost surely, 2^166623982 is an apocalyptic number.

166623982 is a deficient number, since it is larger than the sum of its proper divisors (119624978).

166623982 is a wasteful number, since it uses less digits than its factorization.

166623982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25335.

The product of its digits is 186624, while the sum is 43.

The square root of 166623982 is about 12908.2912114656. The cubic root of 166623982 is about 550.2742235832.

The spelling of 166623982 in words is "one hundred sixty-six million, six hundred twenty-three thousand, nine hundred eighty-two".