16866685033685 has 8 divisors (see below), whose sum is σ = 20483877728160. Its totient is φ = 13330777568464.

The previous prime is 16866685033643. The next prime is 16866685033717. The reversal of 16866685033685 is 58633058666861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16866685033685 - 2¹⁶ = 16866684968149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20321306855 + ... + 20321307684.

It is an arithmetic number, because the mean of its divisors is an integer number (2560484716020).

Almost surely, 2^{16866685033685} is an apocalyptic number.

It is an amenable number.

16866685033685 is a deficient number, since it is larger than the sum of its proper divisors (3617192694475).

16866685033685 is an equidigital number, since it uses as much as digits as its factorization.

16866685033685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40642614627.

The product of its (nonzero) digits is 895795200, while the sum is 71.

The spelling of 16866685033685 in words is "sixteen trillion, eight hundred sixty-six billion, six hundred eighty-five million, thirty-three thousand, six hundred eighty-five".