2020656665 has 16 divisors (see below), whose sum is σ = 2479852800. Its totient is φ = 1579912320.

The previous prime is 2020656653. The next prime is 2020656683. The reversal of 2020656665 is 5666560202.

It is not a de Polignac number, because 2020656665 - 2¹⁸ = 2020394521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173186 + ... + 184484.

It is an arithmetic number, because the mean of its divisors is an integer number (154990800).

Almost surely, 2^2020656665 is an apocalyptic number.

It is an amenable number.

2020656665 is a deficient number, since it is larger than the sum of its proper divisors (459196135).

2020656665 is a wasteful number, since it uses less digits than its factorization.

2020656665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12112.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 2020656665 is about 44951.7148171235. The cubic root of 2020656665 is about 1264.2438293519.

The spelling of 2020656665 in words is "two billion, twenty million, six hundred fifty-six thousand, six hundred sixty-five".