166811338 has 8 divisors (see below), whose sum is σ = 250272900. Its totient is φ = 83387040.

The previous prime is 166811321. The next prime is 166811347. The reversal of 166811338 is 833118661.

It can be written as a sum of positive squares in 2 ways, for example, as 164942649 + 1868689 = 12843^2 + 1367^2 .

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 = 166811297 and 166811306.

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, 9388 + ... + 20536.

Almost surely, 2^166811338 is an apocalyptic number.

166811338 is a deficient number, since it is larger than the sum of its proper divisors (83461562).

166811338 is a wasteful number, since it uses less digits than its factorization.

166811338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18632.

The product of its digits is 20736, while the sum is 37.

The square root of 166811338 is about 12915.5463686210. The cubic root of 166811338 is about 550.4803935048.

Adding to 166811338 its reverse (833118661), we get a palindrome (999929999).

The spelling of 166811338 in words is "one hundred sixty-six million, eight hundred eleven thousand, three hundred thirty-eight".