16687716 has 12 divisors (see below), whose sum is σ = 38938032. Its totient is φ = 5562568.

The previous prime is 16687691. The next prime is 16687717. The reversal of 16687716 is 61778661.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695310 + ... + 695333.

It is an arithmetic number, because the mean of its divisors is an integer number (3244836).

Almost surely, 2^16687716 is an apocalyptic number.

It is an amenable number.

16687716 is an abundant number, since it is smaller than the sum of its proper divisors (22250316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16687716 is a wasteful number, since it uses less digits than its factorization.

16687716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390650 (or 1390648 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 16687716 is about 4085.0600974771. The cubic root of 16687716 is about 255.5439675765.

The spelling of 16687716 in words is "sixteen million, six hundred eighty-seven thousand, seven hundred sixteen".