2665623313 has 4 divisors (see below), whose sum is σ = 2679579648. Its totient is φ = 2651666980.

The previous prime is 2665623281. The next prime is 2665623383. The reversal of 2665623313 is 3133265662.

2665623313 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3133265662 = 2 ⋅1566632831.

It is a cyclic number.

It is not a de Polignac number, because 2665623313 - 2⁵ = 2665623281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665623383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6977881 + ... + 6978262.

It is an arithmetic number, because the mean of its divisors is an integer number (669894912).

Almost surely, 2^2665623313 is an apocalyptic number.

It is an amenable number.

2665623313 is a deficient number, since it is larger than the sum of its proper divisors (13956335).

2665623313 is a wasteful number, since it uses less digits than its factorization.

2665623313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13956334.

The product of its digits is 116640, while the sum is 37.

The square root of 2665623313 is about 51629.6747326574. The cubic root of 2665623313 is about 1386.5416698522.

Adding to 2665623313 its reverse (3133265662), we get a palindrome (5798888975).

The spelling of 2665623313 in words is "two billion, six hundred sixty-five million, six hundred twenty-three thousand, three hundred thirteen".