2665821992 has 32 divisors (see below), whose sum is σ = 5230396800. Its totient is φ = 1271375424.

The previous prime is 2665821989. The next prime is 2665822007. The reversal of 2665821992 is 2991285662.

It is a self number, because there is not a number n which added to its sum of digits gives 2665821992.

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 7 ways as a sum of consecutive naturals, for example, 45878 + ... + 86234.

It is an arithmetic number, because the mean of its divisors is an integer number (163449900).

Almost surely, 2^2665821992 is an apocalyptic number.

It is an amenable number.

2665821992 is a deficient number, since it is larger than the sum of its proper divisors (2564574808).

2665821992 is a wasteful number, since it uses less digits than its factorization.

2665821992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40745 (or 40741 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 2665821992 is about 51631.5987743940. The cubic root of 2665821992 is about 1386.5761170635.

The spelling of 2665821992 in words is "two billion, six hundred sixty-five million, eight hundred twenty-one thousand, nine hundred ninety-two".