43666056066165 has 64 divisors (see below), whose sum is σ = 77022915137280. Its totient is φ = 20991568066560.

The previous prime is 43666056066137. The next prime is 43666056066167. The reversal of 43666056066165 is 56166065066634.

It is not a de Polignac number, because 43666056066165 - 2¹⁶ = 43666056000629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43666056066099 and 43666056066108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43666056066167) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7831320 + ... + 12192689.

It is an arithmetic number, because the mean of its divisors is an integer number (1203483049020).

Almost surely, 2^{43666056066165} is an apocalyptic number.

It is an amenable number.

43666056066165 is a deficient number, since it is larger than the sum of its proper divisors (33356859071115).

43666056066165 is a wasteful number, since it uses less digits than its factorization.

43666056066165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20024294.

The product of its (nonzero) digits is 83980800, while the sum is 60.

The spelling of 43666056066165 in words is "forty-three trillion, six hundred sixty-six billion, fifty-six million, sixty-six thousand, one hundred sixty-five".