16685407 has 8 divisors (see below), whose sum is σ = 17209584. Its totient is φ = 16169088.

The previous prime is 16685399. The next prime is 16685413. The reversal of 16685407 is 70458661.

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 16685407 - 2³ = 16685399 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 (16685437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2503 + ... + 6295.

It is an arithmetic number, because the mean of its divisors is an integer number (2151198).

Almost surely, 2^16685407 is an apocalyptic number.

16685407 is a deficient number, since it is larger than the sum of its proper divisors (524177).

16685407 is an equidigital number, since it uses as much as digits as its factorization.

16685407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3929.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 16685407 is about 4084.7774725192. Note that the first 3 decimals coincide. The cubic root of 16685407 is about 255.5321808979.

The spelling of 16685407 in words is "sixteen million, six hundred eighty-five thousand, four hundred seven".