166533684443 has 16 divisors (see below), whose sum is σ = 191870536704. Its totient is φ = 141585122880.

The previous prime is 166533684413. The next prime is 166533684491. The reversal of 166533684443 is 344486335661.

It is a cyclic number.

It is not a de Polignac number, because 166533684443 - 2¹⁸ = 166533422299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166533684413) 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, 1109996 + ... + 1251062.

It is an arithmetic number, because the mean of its divisors is an integer number (11991908544).

Almost surely, 2^166533684443 is an apocalyptic number.

166533684443 is a deficient number, since it is larger than the sum of its proper divisors (25336852261).

166533684443 is a wasteful number, since it uses less digits than its factorization.

166533684443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142442.

The product of its digits is 14929920, while the sum is 53.

The spelling of 166533684443 in words is "one hundred sixty-six billion, five hundred thirty-three million, six hundred eighty-four thousand, four hundred forty-three".