2066105657 has 16 divisors (see below), whose sum is σ = 2711500800. Its totient is φ = 1525217040.

The previous prime is 2066105653. The next prime is 2066105677. The reversal of 2066105657 is 7565016602.

It is a cyclic number.

It is not a de Polignac number, because 2066105657 - 2² = 2066105653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2066105657.

It is not an unprimeable number, because it can be changed into a prime (2066105653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 704657 + ... + 707582.

It is an arithmetic number, because the mean of its divisors is an integer number (169468800).

Almost surely, 2^2066105657 is an apocalyptic number.

It is an amenable number.

2066105657 is a deficient number, since it is larger than the sum of its proper divisors (645395143).

2066105657 is a wasteful number, since it uses less digits than its factorization.

2066105657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412276.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 2066105657 is about 45454.4349541384. The cubic root of 2066105657 is about 1273.6521770296.

The spelling of 2066105657 in words is "two billion, sixty-six million, one hundred five thousand, six hundred fifty-seven".