16681867 has 8 divisors (see below), whose sum is σ = 17735760. Its totient is φ = 15645600.

The previous prime is 16681849. The next prime is 16681897. The reversal of 16681867 is 76818661.

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

It is a cyclic number.

It is not a de Polignac number, because 16681867 - 2¹⁹ = 16157579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16681817) 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, 2428 + ... + 6265.

It is an arithmetic number, because the mean of its divisors is an integer number (2216970).

Almost surely, 2^16681867 is an apocalyptic number.

16681867 is a deficient number, since it is larger than the sum of its proper divisors (1053893).

16681867 is a wasteful number, since it uses less digits than its factorization.

16681867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8813.

The product of its digits is 96768, while the sum is 43.

The square root of 16681867 is about 4084.3441333952. The cubic root of 16681867 is about 255.5141082611.

The spelling of 16681867 in words is "sixteen million, six hundred eighty-one thousand, eight hundred sixty-seven".