2066105639 has 8 divisors (see below), whose sum is σ = 2296812672. Its totient is φ = 1845652320.

The previous prime is 2066105633. The next prime is 2066105653. The reversal of 2066105639 is 9365016602.

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 2066105639 - 2⁴ = 2066105623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066105633) 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, 2563004 + ... + 2563809.

It is an arithmetic number, because the mean of its divisors is an integer number (287101584).

Almost surely, 2^2066105639 is an apocalyptic number.

2066105639 is a deficient number, since it is larger than the sum of its proper divisors (230707033).

2066105639 is a wasteful number, since it uses less digits than its factorization.

2066105639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126857.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 2066105639 is about 45454.4347561379. The cubic root of 2066105639 is about 1273.6521733309.

The spelling of 2066105639 in words is "two billion, sixty-six million, one hundred five thousand, six hundred thirty-nine".