166322331 has 24 divisors (see below), whose sum is σ = 280410624. Its totient is φ = 93017520.

The previous prime is 166322287. The next prime is 166322381. The reversal of 166322331 is 133223661.

It is a happy number.

166322331 is a `hidden beast` number, since 1 + 6 + 6 + 322 + 331 = 666.

It is not a de Polignac number, because 166322331 - 2⁶ = 166322267 is a prime.

It is a super-2 number, since 2×166322331² = 55326235578547122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166322295 and 166322304.

It is not an unprimeable number, because it can be changed into a prime (166322381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25125 + ... + 31046.

It is an arithmetic number, because the mean of its divisors is an integer number (11683776).

Almost surely, 2^166322331 is an apocalyptic number.

166322331 is a deficient number, since it is larger than the sum of its proper divisors (114088293).

166322331 is a wasteful number, since it uses less digits than its factorization.

166322331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56231 (or 56228 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 166322331 is about 12896.6015290851. The cubic root of 166322331 is about 549.9419564091.

Adding to 166322331 its reverse (133223661), we get a palindrome (299545992).

The spelling of 166322331 in words is "one hundred sixty-six million, three hundred twenty-two thousand, three hundred thirty-one".