16676689 has 4 divisors (see below), whose sum is σ = 16709220. Its totient is φ = 16644160.

The previous prime is 16676687. The next prime is 16676701. The reversal of 16676689 is 98667661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1404225 + 15272464 = 1185^2 + 3908^2 .

It is a cyclic number.

It is not a de Polignac number, because 16676689 - 2¹ = 16676687 is a prime.

It is a super-2 number, since 2×16676689² = 556223912005442, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16676687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15484 + ... + 16525.

It is an arithmetic number, because the mean of its divisors is an integer number (4177305).

Almost surely, 2^16676689 is an apocalyptic number.

It is an amenable number.

16676689 is a deficient number, since it is larger than the sum of its proper divisors (32531).

16676689 is an equidigital number, since it uses as much as digits as its factorization.

16676689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32530.

The product of its digits is 653184, while the sum is 49.

The square root of 16676689 is about 4083.7102002958. The cubic root of 16676689 is about 255.4876685952.

The spelling of 16676689 in words is "sixteen million, six hundred seventy-six thousand, six hundred eighty-nine".