16689716 has 12 divisors (see below), whose sum is σ = 30925188. Its totient is φ = 7853952.

The previous prime is 16689713. The next prime is 16689731. The reversal of 16689716 is 61798661.

It can be written as a sum of positive squares in 2 ways, for example, as 14409616 + 2280100 = 3796^2 + 1510^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16689713) 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, 122651 + ... + 122786.

It is an arithmetic number, because the mean of its divisors is an integer number (2577099).

Almost surely, 2^16689716 is an apocalyptic number.

It is an amenable number.

16689716 is a deficient number, since it is larger than the sum of its proper divisors (14235472).

16689716 is a wasteful number, since it uses less digits than its factorization.

16689716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245458 (or 245456 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 16689716 is about 4085.3048845833. The cubic root of 16689716 is about 255.5541760340.

The spelling of 16689716 in words is "sixteen million, six hundred eighty-nine thousand, seven hundred sixteen".