166073238 has 24 divisors (see below), whose sum is σ = 380992248. Its totient is φ = 52101312.

The previous prime is 166073233. The next prime is 166073239. The reversal of 166073238 is 832370661.

It is a happy number.

166073238 is a `hidden beast` number, since 16 + 607 + 3 + 2 + 38 = 666.

166073238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166073233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271056 + ... + 271667.

It is an arithmetic number, because the mean of its divisors is an integer number (15874677).

Almost surely, 2^166073238 is an apocalyptic number.

166073238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166073238 is an abundant number, since it is smaller than the sum of its proper divisors (214919010).

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

166073238 is a wasteful number, since it uses less digits than its factorization.

166073238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542748 (or 542745 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 166073238 is about 12886.9405989164. The cubic root of 166073238 is about 549.6672786513.

The spelling of 166073238 in words is "one hundred sixty-six million, seventy-three thousand, two hundred thirty-eight".