166352238 has 64 divisors (see below), whose sum is σ = 415457280. Its totient is φ = 48955104.

The previous prime is 166352237. The next prime is 166352267. The reversal of 166352238 is 832253661.

It is a happy number.

166352238 is a `hidden beast` number, since 16 + 635 + 2 + 2 + 3 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166352237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10995 + ... + 21297.

It is an arithmetic number, because the mean of its divisors is an integer number (6491520).

Almost surely, 2^166352238 is an apocalyptic number.

166352238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166352238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207728640).

166352238 is an abundant number, since it is smaller than the sum of its proper divisors (249105042).

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

166352238 is a wasteful number, since it uses less digits than its factorization.

166352238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10350 (or 10344 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 166352238 is about 12897.7609684782. The cubic root of 166352238 is about 549.9749167624.

The spelling of 166352238 in words is "one hundred sixty-six million, three hundred fifty-two thousand, two hundred thirty-eight".