2630665813 has 4 divisors (see below), whose sum is σ = 2630791980. Its totient is φ = 2630539648.

The previous prime is 2630665787. The next prime is 2630665847. The reversal of 2630665813 is 3185660362.

2630665813 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 701084484 + 1929581329 = 26478^2 + 43927^2 .

It is a cyclic number.

It is not a de Polignac number, because 2630665813 - 2¹⁷ = 2630534741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2630665013) 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, 23548 + ... + 76261.

It is an arithmetic number, because the mean of its divisors is an integer number (657697995).

Almost surely, 2^2630665813 is an apocalyptic number.

It is an amenable number.

2630665813 is a deficient number, since it is larger than the sum of its proper divisors (126167).

2630665813 is an equidigital number, since it uses as much as digits as its factorization.

2630665813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126166.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 2630665813 is about 51290.0166991589. The cubic root of 2630665813 is about 1380.4538542558.

The spelling of 2630665813 in words is "two billion, six hundred thirty million, six hundred sixty-five thousand, eight hundred thirteen".