16681411 has 6 divisors (see below), whose sum is σ = 17578140. Its totient is φ = 15786576.

The previous prime is 16681397. The next prime is 16681421. The reversal of 16681411 is 11418661.

It is not a de Polignac number, because 16681411 - 2¹³ = 16673219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16681411.

It is not an unprimeable number, because it can be changed into a prime (16681421) 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, 17335 + ... + 18271.

It is an arithmetic number, because the mean of its divisors is an integer number (2929690).

Almost surely, 2^16681411 is an apocalyptic number.

16681411 is a deficient number, since it is larger than the sum of its proper divisors (896729).

16681411 is an frugal number, since it uses more digits than its factorization.

16681411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893 (or 956 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 16681411 is about 4084.2883100976. The cubic root of 16681411 is about 255.5117800745.

The spelling of 16681411 in words is "sixteen million, six hundred eighty-one thousand, four hundred eleven".