16416685 has 4 divisors (see below), whose sum is σ = 19700028. Its totient is φ = 13133344.

The previous prime is 16416683. The next prime is 16416707. The reversal of 16416685 is 58661461.

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 6215049 + 10201636 = 2493^2 + 3194^2 .

It is a cyclic number.

It is not a de Polignac number, because 16416685 - 2¹ = 16416683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16416683) 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, 1641664 + ... + 1641673.

It is an arithmetic number, because the mean of its divisors is an integer number (4925007).

Almost surely, 2^16416685 is an apocalyptic number.

It is an amenable number.

16416685 is a deficient number, since it is larger than the sum of its proper divisors (3283343).

16416685 is an equidigital number, since it uses as much as digits as its factorization.

16416685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283342.

The product of its digits is 34560, while the sum is 37.

The square root of 16416685 is about 4051.7508561115. The cubic root of 16416685 is about 254.1529500197.

The spelling of 16416685 in words is "sixteen million, four hundred sixteen thousand, six hundred eighty-five".