2166689845435 has 4 divisors (see below), whose sum is σ = 2600027814528. Its totient is φ = 1733351876344.

The previous prime is 2166689845423. The next prime is 2166689845469. The reversal of 2166689845435 is 5345489866612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2166689845435 - 2¹³ = 2166689837243 is a prime.

It is a super-2 number, since 2×2166689845435² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 216668984539 + ... + 216668984548.

It is an arithmetic number, because the mean of its divisors is an integer number (650006953632).

Almost surely, 2^{2166689845435} is an apocalyptic number.

2166689845435 is a deficient number, since it is larger than the sum of its proper divisors (433337969093).

2166689845435 is an equidigital number, since it uses as much as digits as its factorization.

2166689845435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433337969092.

The product of its digits is 298598400, while the sum is 67.

The spelling of 2166689845435 in words is "two trillion, one hundred sixty-six billion, six hundred eighty-nine million, eight hundred forty-five thousand, four hundred thirty-five".