2665623312 has 60 divisors (see below), whose sum is σ = 8138233584. Its totient is φ = 807764160.

The previous prime is 2665623281. The next prime is 2665623383. The reversal of 2665623312 is 2133265662.

2665623312 is a `hidden beast` number, since 2 + 66 + 562 + 3 + 31 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 839838 + ... + 843005.

Almost surely, 2^2665623312 is an apocalyptic number.

2665623312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2665623312 is an abundant number, since it is smaller than the sum of its proper divisors (5472610272).

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

2665623312 is a wasteful number, since it uses less digits than its factorization.

2665623312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682868 (or 1682859 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 2665623312 is about 51629.6747229730. The cubic root of 2665623312 is about 1386.5416696788.

Adding to 2665623312 its reverse (2133265662), we get a palindrome (4798888974).

The spelling of 2665623312 in words is "two billion, six hundred sixty-five million, six hundred twenty-three thousand, three hundred twelve".