16668616 has 16 divisors (see below), whose sum is σ = 31766940. Its totient is φ = 8197440.

The previous prime is 16668569. The next prime is 16668647. The reversal of 16668616 is 61686661.

It can be written as a sum of positive squares in 2 ways, for example, as 16240900 + 427716 = 4030^2 + 654^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16591 + ... + 17566.

Almost surely, 2^16668616 is an apocalyptic number.

It is an amenable number.

16668616 is a deficient number, since it is larger than the sum of its proper divisors (15098324).

16668616 is a wasteful number, since it uses less digits than its factorization.

16668616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34224 (or 34220 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 16668616 is about 4082.7216412584. The cubic root of 16668616 is about 255.4464356931.

The spelling of 16668616 in words is "sixteen million, six hundred sixty-eight thousand, six hundred sixteen".