166442535 has 48 divisors (see below), whose sum is σ = 330969600. Its totient is φ = 75798720.

The previous prime is 166442501. The next prime is 166442561. The reversal of 166442535 is 535244661.

166442535 is a `hidden beast` number, since 1 + 6 + 644 + 2 + 5 + 3 + 5 = 666.

It is not a de Polignac number, because 166442535 - 2⁷ = 166442407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166442535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97116 + ... + 98814.

It is an arithmetic number, because the mean of its divisors is an integer number (6895200).

Almost surely, 2^166442535 is an apocalyptic number.

166442535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166442535 is a deficient number, since it is larger than the sum of its proper divisors (164527065).

166442535 is a wasteful number, since it uses less digits than its factorization.

166442535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028 (or 2025 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 166442535 is about 12901.2609848805. The cubic root of 166442535 is about 550.0744086657.

The spelling of 166442535 in words is "one hundred sixty-six million, four hundred forty-two thousand, five hundred thirty-five".