166533426 has 48 divisors (see below), whose sum is σ = 375148800. Its totient is φ = 53333280.

The previous prime is 166533421. The next prime is 166533427. The reversal of 166533426 is 624335661.

166533426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166533421) 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, 82141 + ... + 84143.

It is an arithmetic number, because the mean of its divisors is an integer number (7815600).

Almost surely, 2^166533426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166533426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187574400).

166533426 is an abundant number, since it is smaller than the sum of its proper divisors (208615374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166533426 is a wasteful number, since it uses less digits than its factorization.

166533426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191 (or 2188 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 166533426 is about 12904.7830667547. The cubic root of 166533426 is about 550.1745187229.

The spelling of 166533426 in words is "one hundred sixty-six million, five hundred thirty-three thousand, four hundred twenty-six".