16683705517 has 4 divisors (see below), whose sum is σ = 16695547740. Its totient is φ = 16671863296.

The previous prime is 16683705419. The next prime is 16683705551. The reversal of 16683705517 is 71550738661.

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 799136361 + 15884569156 = 28269^2 + 126034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16683705517 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 (16683702517) 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, 5918998 + ... + 5921815.

It is an arithmetic number, because the mean of its divisors is an integer number (4173886935).

Almost surely, 2^16683705517 is an apocalyptic number.

It is an amenable number.

16683705517 is a deficient number, since it is larger than the sum of its proper divisors (11842223).

16683705517 is a wasteful number, since it uses less digits than its factorization.

16683705517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11842222.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 16683705517 in words is "sixteen billion, six hundred eighty-three million, seven hundred five thousand, five hundred seventeen".