166666664 has 16 divisors (see below), whose sum is σ = 322581120. Its totient is φ = 80645040.

The previous prime is 166666649. The next prime is 166666673. The reversal of 166666664 is 466666661.

166666664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 335774 + ... + 336269.

It is an arithmetic number, because the mean of its divisors is an integer number (20161320).

Almost surely, 2^166666664 is an apocalyptic number.

It is an amenable number.

166666664 is a deficient number, since it is larger than the sum of its proper divisors (155914456).

166666664 is a wasteful number, since it uses less digits than its factorization.

166666664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672080 (or 672076 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 47.

The square root of 166666664 is about 12909.9443840785. The cubic root of 166666664 is about 550.3212052141.

The spelling of 166666664 in words is "one hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-four".