2065720679 has 16 divisors (see below), whose sum is σ = 2386711680. Its totient is φ = 1768145760.

The previous prime is 2065720667. The next prime is 2065720687. The reversal of 2065720679 is 9760275602.

It is a de Polignac number, because none of the positive numbers 2^k-2065720679 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2065720649) 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, 3749 + ... + 64385.

It is an arithmetic number, because the mean of its divisors is an integer number (149169480).

Almost surely, 2^2065720679 is an apocalyptic number.

2065720679 is a deficient number, since it is larger than the sum of its proper divisors (320991001).

2065720679 is a wasteful number, since it uses less digits than its factorization.

2065720679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60830.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 2065720679 is about 45450.1999885589. The cubic root of 2065720679 is about 1273.5730654695.

The spelling of 2065720679 in words is "two billion, sixty-five million, seven hundred twenty thousand, six hundred seventy-nine".