16664668 has 24 divisors (see below), whose sum is σ = 29882160. Its totient is φ = 8129280.

The previous prime is 16664663. The next prime is 16664671. The reversal of 16664668 is 86646661.

It is a super-2 number, since 2×16664668² = 555422319100448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16664663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56730 + ... + 57022.

It is an arithmetic number, because the mean of its divisors is an integer number (1245090).

Almost surely, 2^16664668 is an apocalyptic number.

It is an amenable number.

16664668 is a deficient number, since it is larger than the sum of its proper divisors (13217492).

16664668 is a wasteful number, since it uses less digits than its factorization.

16664668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 595 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 16664668 is about 4082.2381116246. The cubic root of 16664668 is about 255.4262664089.

The spelling of 16664668 in words is "sixteen million, six hundred sixty-four thousand, six hundred sixty-eight".