16676181 has 6 divisors (see below), whose sum is σ = 24087830. Its totient is φ = 11117448.

The previous prime is 16676161. The next prime is 16676183. The reversal of 16676181 is 18167661.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 6081156 = 3255^2 + 2466^2 .

It is not a de Polignac number, because 16676181 - 2⁹ = 16675669 is a prime.

It is a super-2 number, since 2×16676181² = 556190025489522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16676183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 926446 + ... + 926463.

Almost surely, 2^16676181 is an apocalyptic number.

It is an amenable number.

16676181 is a deficient number, since it is larger than the sum of its proper divisors (7411649).

16676181 is a wasteful number, since it uses less digits than its factorization.

16676181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852915 (or 1852912 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 16676181 is about 4083.6480014810. The cubic root of 16676181 is about 255.4850743742.

The spelling of 16676181 in words is "sixteen million, six hundred seventy-six thousand, one hundred eighty-one".