16666666666 has 16 divisors (see below), whose sum is σ = 26926991784. Its totient is φ = 7691189184.

The previous prime is 16666666631. The next prime is 16666666697. The reversal of 16666666666 is 66666666661.

16666666666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16479113641 + 187553025 = 128371^2 + 13695^2 .

16666666666 is a modest number, since divided by 666666 gives 16666 as remainder.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151536 + ... + 237268.

Almost surely, 2^16666666666 is an apocalyptic number.

16666666666 is a deficient number, since it is larger than the sum of its proper divisors (10260325118).

16666666666 is a wasteful number, since it uses less digits than its factorization.

16666666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93225.

The product of its digits is 60466176, while the sum is 61.

It can be divided in two parts, 166666 and 66666, that added together give a palindrome (233332).

The spelling of 16666666666 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".