164685668 has 36 divisors (see below), whose sum is σ = 344329020. Its totient is φ = 68668992.

The previous prime is 164685659. The next prime is 164685679. The reversal of 164685668 is 866586461.

164685668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 60808804 + 103876864 = 7798^2 + 10192^2 .

It is a super-3 number, since 3×164685668³ (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 11 ways as a sum of consecutive naturals, for example, 4103 + ... + 18606.

It is an arithmetic number, because the mean of its divisors is an integer number (9564695).

Almost surely, 2^164685668 is an apocalyptic number.

It is an amenable number.

164685668 is an abundant number, since it is smaller than the sum of its proper divisors (179643352).

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

164685668 is a wasteful number, since it uses less digits than its factorization.

164685668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22764 (or 22755 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 164685668 is about 12832.9913893838. The cubic root of 164685668 is about 548.1321408656.

The spelling of 164685668 in words is "one hundred sixty-four million, six hundred eighty-five thousand, six hundred sixty-eight".