16675809 has 4 divisors (see below), whose sum is σ = 22234416. Its totient is φ = 11117204.

The previous prime is 16675751. The next prime is 16675811. The reversal of 16675809 is 90857661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16675809 - 2¹⁶ = 16610273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16675829) 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, 2779299 + ... + 2779304.

It is an arithmetic number, because the mean of its divisors is an integer number (5558604).

Almost surely, 2^16675809 is an apocalyptic number.

It is an amenable number.

16675809 is a deficient number, since it is larger than the sum of its proper divisors (5558607).

16675809 is an equidigital number, since it uses as much as digits as its factorization.

16675809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5558606.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 16675809 is about 4083.6024537166. The cubic root of 16675809 is about 255.4831746356.

The spelling of 16675809 in words is "sixteen million, six hundred seventy-five thousand, eight hundred nine".