166666660 has 24 divisors (see below), whose sum is σ = 350280000. Its totient is φ = 66613344.

The previous prime is 166666649. The next prime is 166666673. The reversal of 166666660 is 66666661.

166666660 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 7 ways as a sum of consecutive naturals, for example, 30841 + ... + 35839.

It is an arithmetic number, because the mean of its divisors is an integer number (14595000).

Almost surely, 2^166666660 is an apocalyptic number.

166666660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166666660 is an abundant number, since it is smaller than the sum of its proper divisors (183613340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166666660 is a wasteful number, since it uses less digits than its factorization.

166666660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675 (or 6673 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 166666660 is about 12909.9442291592. The cubic root of 166666660 is about 550.3212008115.

Subtracting from 166666660 its reverse (66666661), we obtain a palindrome (99999999).

The spelling of 166666660 in words is "one hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty".