16666666664 has 32 divisors (see below), whose sum is σ = 31734167040. Its totient is φ = 8204548800.

The previous prime is 16666666631. The next prime is 16666666697. The reversal of 16666666664 is 46666666661.

It is an interprime number because it is at equal distance from previous prime (16666666631) and next prime (16666666697).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396329 + ... + 436359.

It is an arithmetic number, because the mean of its divisors is an integer number (991692720).

Almost surely, 2^16666666664 is an apocalyptic number.

It is an amenable number.

16666666664 is a deficient number, since it is larger than the sum of its proper divisors (15067500376).

16666666664 is a wasteful number, since it uses less digits than its factorization.

16666666664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40841 (or 40837 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 59.

The spelling of 16666666664 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-four".