166888388 has 24 divisors (see below), whose sum is σ = 319901400. Its totient is φ = 75826688.

The previous prime is 166888387. The next prime is 166888433. The reversal of 166888388 is 883888661.

166888388 is digitally balanced in base 3, 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 4 ways, for example, as 96864964 + 70023424 = 9842^2 + 8368^2 .

It is not an unprimeable number, because it can be changed into a prime (166888387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40343 + ... + 44286.

It is an arithmetic number, because the mean of its divisors is an integer number (13329225).

Almost surely, 2^166888388 is an apocalyptic number.

It is an amenable number.

166888388 is a deficient number, since it is larger than the sum of its proper divisors (153013012).

166888388 is a wasteful number, since it uses less digits than its factorization.

166888388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84679 (or 84677 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 56.

The square root of 166888388 is about 12918.5288636129. The cubic root of 166888388 is about 550.5651359171.

The spelling of 166888388 in words is "one hundred sixty-six million, eight hundred eighty-eight thousand, three hundred eighty-eight".