16666668 has 24 divisors (see below), whose sum is σ = 43210160. Its totient is φ = 5555520.

The previous prime is 16666631. The next prime is 16666669. The reversal of 16666668 is 86666661.

16666668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (16666669) 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, 77053 + ... + 77268.

Almost surely, 2^16666668 is an apocalyptic number.

16666668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16666668 is an abundant number, since it is smaller than the sum of its proper divisors (26543492).

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

16666668 is a wasteful number, since it uses less digits than its factorization.

16666668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154334 (or 154326 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 16666668 is about 4082.4830679379. The cubic root of 16666668 is about 255.4364842762.

The spelling of 16666668 in words is "sixteen million, six hundred sixty-six thousand, six hundred sixty-eight".