16716668447 has 8 divisors (see below), whose sum is σ = 17446145040. Its totient is φ = 15997394560.

The previous prime is 16716668443. The next prime is 16716668453. The reversal of 16716668447 is 74486661761.

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 16716668447 - 2² = 16716668443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16716668392 and 16716668401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16716668443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2547329 + ... + 2553882.

It is an arithmetic number, because the mean of its divisors is an integer number (2180768130).

Almost surely, 2^16716668447 is an apocalyptic number.

16716668447 is a deficient number, since it is larger than the sum of its proper divisors (729476593).

16716668447 is a wasteful number, since it uses less digits than its factorization.

16716668447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101353.

The product of its digits is 8128512, while the sum is 56.

The spelling of 16716668447 in words is "sixteen billion, seven hundred sixteen million, six hundred sixty-eight thousand, four hundred forty-seven".