166138600 has 24 divisors (see below), whose sum is σ = 386272710. Its totient is φ = 66455360.

The previous prime is 166138597. The next prime is 166138619. The reversal of 166138600 is 6831661.

166138600 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 3 ways, for example, as 107371044 + 58767556 = 10362^2 + 7666^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 415147 + ... + 415546.

Almost surely, 2^166138600 is an apocalyptic number.

166138600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166138600 is an abundant number, since it is smaller than the sum of its proper divisors (220134110).

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

166138600 is a wasteful number, since it uses less digits than its factorization.

166138600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830709 (or 830700 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 166138600 is about 12889.4763276093. The cubic root of 166138600 is about 549.7393806564.

The spelling of 166138600 in words is "one hundred sixty-six million, one hundred thirty-eight thousand, six hundred".