166605100043 has 4 divisors (see below), whose sum is σ = 168714025440. Its totient is φ = 164496174648.

The previous prime is 166605100033. The next prime is 166605100087. The reversal of 166605100043 is 340001506661.

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 166605100043 - 2²⁴ = 166588322827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166605099982 and 166605100009.

It is not an unprimeable number, because it can be changed into a prime (166605100033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1054462580 + ... + 1054462737.

It is an arithmetic number, because the mean of its divisors is an integer number (42178506360).

Almost surely, 2^166605100043 is an apocalyptic number.

166605100043 is a deficient number, since it is larger than the sum of its proper divisors (2108925397).

166605100043 is an equidigital number, since it uses as much as digits as its factorization.

166605100043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108925396.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 166605100043 in words is "one hundred sixty-six billion, six hundred five million, one hundred thousand, forty-three".