2166805104427 has 8 divisors (see below), whose sum is σ = 2168165042000. Its totient is φ = 2165445494784.

The previous prime is 2166805104407. The next prime is 2166805104439. The reversal of 2166805104427 is 7244015086612.

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 2166805104427 - 2¹⁹ = 2166804580139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166805104407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13874824 + ... + 14030122.

It is an arithmetic number, because the mean of its divisors is an integer number (271020630250).

Almost surely, 2^{2166805104427} is an apocalyptic number.

2166805104427 is a deficient number, since it is larger than the sum of its proper divisors (1359937573).

2166805104427 is a wasteful number, since it uses less digits than its factorization.

2166805104427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163965.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 2166805104427 in words is "two trillion, one hundred sixty-six billion, eight hundred five million, one hundred four thousand, four hundred twenty-seven".