16666685016685 has 32 divisors (see below), whose sum is σ = 22080302853120. Its totient is φ = 12076163851840.

The previous prime is 16666685016671. The next prime is 16666685016691. The reversal of 16666685016685 is 58661058666661.

16666685016685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16666685016685 - 2⁹ = 16666685016173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2864797 + ... + 6445186.

It is an arithmetic number, because the mean of its divisors is an integer number (690009464160).

Almost surely, 2^{16666685016685} is an apocalyptic number.

It is an amenable number.

16666685016685 is a deficient number, since it is larger than the sum of its proper divisors (5413617836435).

16666685016685 is an equidigital number, since it uses as much as digits as its factorization.

16666685016685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9310290 (or 9310268 counting only the distinct ones).

The product of its (nonzero) digits is 447897600, while the sum is 70.

The spelling of 16666685016685 in words is "sixteen trillion, six hundred sixty-six billion, six hundred eighty-five million, sixteen thousand, six hundred eighty-five".