16666858361085 has 32 divisors (see below), whose sum is σ = 28241947399680. Its totient is φ = 8364234175488.

The previous prime is 16666858361063. The next prime is 16666858361147. The reversal of 16666858361085 is 58016385866661.

It is not a de Polignac number, because 16666858361085 - 2⁵ = 16666858361053 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, 6184390 + ... + 8460519.

It is an arithmetic number, because the mean of its divisors is an integer number (882560856240).

Almost surely, 2^{16666858361085} is an apocalyptic number.

16666858361085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16666858361085 is a deficient number, since it is larger than the sum of its proper divisors (11575089038595).

16666858361085 is a wasteful number, since it uses less digits than its factorization.

16666858361085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14649397.

The product of its (nonzero) digits is 298598400, while the sum is 69.

The spelling of 16666858361085 in words is "sixteen trillion, six hundred sixty-six billion, eight hundred fifty-eight million, three hundred sixty-one thousand, eighty-five".