166936481 has 16 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 154909440.

The previous prime is 166936477. The next prime is 166936487. The reversal of 166936481 is 184639661.

It is a happy number.

It is not a de Polignac number, because 166936481 - 2² = 166936477 is a prime.

It is a super-2 number, since 2×166936481² = 55735577377326722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166936487) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 698360 + ... + 698598.

It is an arithmetic number, because the mean of its divisors is an integer number (11203920).

Almost surely, 2^166936481 is an apocalyptic number.

It is an amenable number.

166936481 is a deficient number, since it is larger than the sum of its proper divisors (12326239).

166936481 is a wasteful number, since it uses less digits than its factorization.

166936481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its digits is 186624, while the sum is 44.

The square root of 166936481 is about 12920.3901256889. The cubic root of 166936481 is about 550.6180171398.

The spelling of 166936481 in words is "one hundred sixty-six million, nine hundred thirty-six thousand, four hundred eighty-one".