16666666636 has 6 divisors (see below), whose sum is σ = 29166666620. Its totient is φ = 8333333316.

The previous prime is 16666666631. The next prime is 16666666697. The reversal of 16666666636 is 63666666661.

It is not an unprimeable number, because it can be changed into a prime (16666666631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2083333326 + ... + 2083333333.

Almost surely, 2^16666666636 is an apocalyptic number.

It is an amenable number.

16666666636 is a deficient number, since it is larger than the sum of its proper divisors (12499999984).

16666666636 is a wasteful number, since it uses less digits than its factorization.

16666666636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166666663 (or 4166666661 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 58.

The spelling of 16666666636 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred thirty-six".