16687712 has 12 divisors (see below), whose sum is σ = 32853996. Its totient is φ = 8343840.

The previous prime is 16687691. The next prime is 16687717. The reversal of 16687712 is 21778661.

16687712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16687717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260714 + ... + 260777.

It is an arithmetic number, because the mean of its divisors is an integer number (2737833).

Almost surely, 2^16687712 is an apocalyptic number.

It is an amenable number.

16687712 is a deficient number, since it is larger than the sum of its proper divisors (16166284).

16687712 is an equidigital number, since it uses as much as digits as its factorization.

16687712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521501 (or 521493 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 16687712 is about 4085.0596078882. The cubic root of 16687712 is about 255.5439471588.

It can be divided in two parts, 166 and 87712, that added together give a palindrome (87878).

The spelling of 16687712 in words is "sixteen million, six hundred eighty-seven thousand, seven hundred twelve".