16668272 has 20 divisors (see below), whose sum is σ = 33409320. Its totient is φ = 8046528.

The previous prime is 16668271. The next prime is 16668277. The reversal of 16668272 is 27286661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668271) 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, 17498 + ... + 18425.

It is an arithmetic number, because the mean of its divisors is an integer number (1670466).

Almost surely, 2^16668272 is an apocalyptic number.

It is an amenable number.

16668272 is an abundant number, since it is smaller than the sum of its proper divisors (16741048).

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

16668272 is a wasteful number, since it uses less digits than its factorization.

16668272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35960 (or 35954 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 16668272 is about 4082.6795122811. The cubic root of 16668272 is about 255.4446784151. Note that the first 3 decimals are identical.

The spelling of 16668272 in words is "sixteen million, six hundred sixty-eight thousand, two hundred seventy-two".