2889620665 has 4 divisors (see below), whose sum is σ = 3467544804. Its totient is φ = 2311696528.

The previous prime is 2889620659. The next prime is 2889620687. The reversal of 2889620665 is 5660269882.

2889620665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 926776249 + 1962844416 = 30443^2 + 44304^2 .

It is a cyclic number.

It is not a de Polignac number, because 2889620665 - 2⁵ = 2889620633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288962062 + ... + 288962071.

It is an arithmetic number, because the mean of its divisors is an integer number (866886201).

Almost surely, 2^2889620665 is an apocalyptic number.

It is an amenable number.

2889620665 is a deficient number, since it is larger than the sum of its proper divisors (577924139).

2889620665 is an equidigital number, since it uses as much as digits as its factorization.

2889620665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577924138.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The square root of 2889620665 is about 53755.1919817984. The cubic root of 2889620665 is about 1424.3398053964.

The spelling of 2889620665 in words is "two billion, eight hundred eighty-nine million, six hundred twenty thousand, six hundred sixty-five".