2008864665 has 32 divisors (see below), whose sum is σ = 3608156160. Its totient is φ = 1060342272.

The previous prime is 2008864651. The next prime is 2008864667. The reversal of 2008864665 is 5664688002.

It is not a de Polignac number, because 2008864665 - 2⁶ = 2008864601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2008864665.

It is not an unprimeable number, because it can be changed into a prime (2008864667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63609 + ... + 89798.

It is an arithmetic number, because the mean of its divisors is an integer number (112754880).

Almost surely, 2^2008864665 is an apocalyptic number.

It is an amenable number.

2008864665 is a deficient number, since it is larger than the sum of its proper divisors (1599291495).

2008864665 is a wasteful number, since it uses less digits than its factorization.

2008864665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153518 (or 153512 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 2008864665 is about 44820.3599383137. The cubic root of 2008864665 is about 1261.7797694450.

The spelling of 2008864665 in words is "two billion, eight million, eight hundred sixty-four thousand, six hundred sixty-five".