2660422613 has 4 divisors (see below), whose sum is σ = 2661211020. Its totient is φ = 2659634208.

The previous prime is 2660422601. The next prime is 2660422649. The reversal of 2660422613 is 3162240662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1113023044 + 1547399569 = 33362^2 + 39337^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660422613 - 2⁶ = 2660422549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2660422613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660422663) 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, 389120 + ... + 395897.

It is an arithmetic number, because the mean of its divisors is an integer number (665302755).

Almost surely, 2^2660422613 is an apocalyptic number.

It is an amenable number.

2660422613 is a deficient number, since it is larger than the sum of its proper divisors (788407).

2660422613 is an equidigital number, since it uses as much as digits as its factorization.

2660422613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788406.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 2660422613 is about 51579.2847274950. The cubic root of 2660422613 is about 1385.6393565703.

The spelling of 2660422613 in words is "two billion, six hundred sixty million, four hundred twenty-two thousand, six hundred thirteen".