166822331 has 4 divisors (see below), whose sum is σ = 179654832. Its totient is φ = 153989832.

The previous prime is 166822321. The next prime is 166822333. The reversal of 166822331 is 133228661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166822331 - 2⁶ = 166822267 is a prime.

It is a super-2 number, since 2×166822331² = 55659380240547122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166822333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416231 + ... + 6416256.

It is an arithmetic number, because the mean of its divisors is an integer number (44913708).

Almost surely, 2^166822331 is an apocalyptic number.

166822331 is a deficient number, since it is larger than the sum of its proper divisors (12832501).

166822331 is a wasteful number, since it uses less digits than its factorization.

166822331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832500.

The product of its digits is 10368, while the sum is 32.

The square root of 166822331 is about 12915.9719340048. The cubic root of 166822331 is about 550.4924856046.

The spelling of 166822331 in words is "one hundred sixty-six million, eight hundred twenty-two thousand, three hundred thirty-one".