16666668506 has 8 divisors (see below), whose sum is σ = 25581398304. Its totient is φ = 8139535740.

The previous prime is 16666668481. The next prime is 16666668509. The reversal of 16666668506 is 60586666661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16666668509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96899150 + ... + 96899321.

It is an arithmetic number, because the mean of its divisors is an integer number (3197674788).

Almost surely, 2^16666668506 is an apocalyptic number.

16666668506 is a deficient number, since it is larger than the sum of its proper divisors (8914729798).

16666668506 is a wasteful number, since it uses less digits than its factorization.

16666668506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193798516.

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 16666668506 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-eight thousand, five hundred six".