166666384 has 20 divisors (see below), whose sum is σ = 326547180. Its totient is φ = 82396160.

The previous prime is 166666301. The next prime is 166666399. The reversal of 166666384 is 483666661.

It can be written as a sum of positive squares in 2 ways, for example, as 61152400 + 105513984 = 7820^2 + 10272^2 .

It is a super-3 number, since 3×166666384³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57097 + ... + 59944.

It is an arithmetic number, because the mean of its divisors is an integer number (16327359).

Almost surely, 2^166666384 is an apocalyptic number.

It is an amenable number.

166666384 is a deficient number, since it is larger than the sum of its proper divisors (159880796).

166666384 is a wasteful number, since it uses less digits than its factorization.

166666384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117138 (or 117132 counting only the distinct ones).

The product of its digits is 746496, while the sum is 46.

The square root of 166666384 is about 12909.9335397205. The cubic root of 166666384 is about 550.3208970340.

The spelling of 166666384 in words is "one hundred sixty-six million, six hundred sixty-six thousand, three hundred eighty-four".