166426533 has 24 divisors (see below), whose sum is σ = 295870848. Its totient is φ = 87784992.

The previous prime is 166426511. The next prime is 166426553. The reversal of 166426533 is 335624661.

166426533 is a `hidden beast` number, since 1 + 6 + 642 + 6 + 5 + 3 + 3 = 666.

It is not a de Polignac number, because 166426533 - 2⁵ = 166426501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166426553) 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, 100785 + ... + 102422.

It is an arithmetic number, because the mean of its divisors is an integer number (12327952).

Almost surely, 2^166426533 is an apocalyptic number.

166426533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

166426533 is a deficient number, since it is larger than the sum of its proper divisors (129444315).

166426533 is a wasteful number, since it uses less digits than its factorization.

166426533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203233 (or 203230 counting only the distinct ones).

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

The square root of 166426533 is about 12900.6407980379. The cubic root of 166426533 is about 550.0567798130.

The spelling of 166426533 in words is "one hundred sixty-six million, four hundred twenty-six thousand, five hundred thirty-three".