16166481 has 8 divisors (see below), whose sum is σ = 21828480. Its totient is φ = 10641072.

The previous prime is 16166477. The next prime is 16166509. The reversal of 16166481 is 18466161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16166481 - 2² = 16166477 is a prime.

It is a super-2 number, since 2×16166481² = 522710215846722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16166471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33870 + ... + 34343.

It is an arithmetic number, because the mean of its divisors is an integer number (2728560).

Almost surely, 2^16166481 is an apocalyptic number.

It is an amenable number.

16166481 is a deficient number, since it is larger than the sum of its proper divisors (5661999).

16166481 is an equidigital number, since it uses as much as digits as its factorization.

16166481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68295.

The product of its digits is 6912, while the sum is 33.

The square root of 16166481 is about 4020.7562721458. The cubic root of 16166481 is about 252.8551666261.

The spelling of 16166481 in words is "sixteen million, one hundred sixty-six thousand, four hundred eighty-one".