16666685 has 16 divisors (see below), whose sum is σ = 23596032. Its totient is φ = 11059200.

The previous prime is 16666669. The next prime is 16666711. The reversal of 16666685 is 58666661.

It is not a de Polignac number, because 16666685 - 2⁴ = 16666669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6596 + ... + 8765.

It is an arithmetic number, because the mean of its divisors is an integer number (1474752).

Almost surely, 2^16666685 is an apocalyptic number.

It is an amenable number.

16666685 is a deficient number, since it is larger than the sum of its proper divisors (6929347).

16666685 is a wasteful number, since it uses less digits than its factorization.

16666685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15404.

The product of its digits is 311040, while the sum is 44.

The square root of 16666685 is about 4082.4851500036. The cubic root of 16666685 is about 255.4365711245.

The spelling of 16666685 in words is "sixteen million, six hundred sixty-six thousand, six hundred eighty-five".