2066645695 has 32 divisors (see below), whose sum is σ = 2617028352. Its totient is φ = 1565171712.

The previous prime is 2066645683. The next prime is 2066645719. The reversal of 2066645695 is 5965466602.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2066645695 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 908079 + ... + 910351.

It is an arithmetic number, because the mean of its divisors is an integer number (81782136).

Almost surely, 2^2066645695 is an apocalyptic number.

2066645695 is a deficient number, since it is larger than the sum of its proper divisors (550382657).

2066645695 is a wasteful number, since it uses less digits than its factorization.

2066645695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The square root of 2066645695 is about 45460.3749984533. The cubic root of 2066645695 is about 1273.7631362882.

The spelling of 2066645695 in words is "two billion, sixty-six million, six hundred forty-five thousand, six hundred ninety-five".