166394688 has 28 divisors (see below), whose sum is σ = 440253120. Its totient is φ = 55464832.

The previous prime is 166394681. The next prime is 166394717. The reversal of 166394688 is 886493661.

166394688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 166394688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166394681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433128 + ... + 433511.

Almost surely, 2^166394688 is an apocalyptic number.

It is an amenable number.

166394688 is an abundant number, since it is smaller than the sum of its proper divisors (273858432).

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

166394688 is an equidigital number, since it uses as much as digits as its factorization.

166394688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866654 (or 866644 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The square root of 166394688 is about 12899.4064979750. The cubic root of 166394688 is about 550.0216939101.

The spelling of 166394688 in words is "one hundred sixty-six million, three hundred ninety-four thousand, six hundred eighty-eight".