2665899824 has 80 divisors (see below), whose sum is σ = 6197603328. Its totient is φ = 1086134016.

The previous prime is 2665899809. The next prime is 2665899877. The reversal of 2665899824 is 4289985662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427094 + ... + 433290.

Almost surely, 2^2665899824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2665899824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3098801664).

2665899824 is an abundant number, since it is smaller than the sum of its proper divisors (3531703504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2665899824 is a wasteful number, since it uses less digits than its factorization.

2665899824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6402 (or 6396 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 59.

The square root of 2665899824 is about 51632.3524933738. The cubic root of 2665899824 is about 1386.5896112055.

The spelling of 2665899824 in words is "two billion, six hundred sixty-five million, eight hundred ninety-nine thousand, eight hundred twenty-four".