166643333 has 16 divisors (see below), whose sum is σ = 180714240. Its totient is φ = 153094656.

The previous prime is 166643329. The next prime is 166643339. The reversal of 166643333 is 333346661.

It is not a de Polignac number, because 166643333 - 2² = 166643329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166643293 and 166643302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166643339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124916 + ... + 126242.

It is an arithmetic number, because the mean of its divisors is an integer number (11294640).

Almost surely, 2^166643333 is an apocalyptic number.

It is an amenable number.

166643333 is a deficient number, since it is larger than the sum of its proper divisors (14070907).

166643333 is a wasteful number, since it uses less digits than its factorization.

166643333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516.

The product of its digits is 69984, while the sum is 35.

The square root of 166643333 is about 12909.0407467015. The cubic root of 166643333 is about 550.2955249272.

Adding to 166643333 its reverse (333346661), we get a palindrome (499989994).

The spelling of 166643333 in words is "one hundred sixty-six million, six hundred forty-three thousand, three hundred thirty-three".