166009238 has 8 divisors (see below), whose sum is σ = 250083288. Its totient is φ = 82648144.

The previous prime is 166009223. The next prime is 166009241. The reversal of 166009238 is 832900661.

166009238 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 166009198 and 166009207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177656 + ... + 178587.

It is an arithmetic number, because the mean of its divisors is an integer number (31260411).

Almost surely, 2^166009238 is an apocalyptic number.

166009238 is a deficient number, since it is larger than the sum of its proper divisors (84074050).

166009238 is a wasteful number, since it uses less digits than its factorization.

166009238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356478.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 166009238 is about 12884.4572256653. The cubic root of 166009238 is about 549.5966607597.

Adding to 166009238 its reverse (832900661), we get a palindrome (998909899).

The spelling of 166009238 in words is "one hundred sixty-six million, nine thousand, two hundred thirty-eight".