6605662513 has 4 divisors (see below), whose sum is σ = 6642158068. Its totient is φ = 6569166960.

The previous prime is 6605662507. The next prime is 6605662549. The reversal of 6605662513 is 3152665066.

It is a happy number.

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 1238195344 + 5367467169 = 35188^2 + 73263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6605662513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6605662573) 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, 18247506 + ... + 18247867.

It is an arithmetic number, because the mean of its divisors is an integer number (1660539517).

Almost surely, 2^6605662513 is an apocalyptic number.

It is an amenable number.

6605662513 is a deficient number, since it is larger than the sum of its proper divisors (36495555).

6605662513 is a wasteful number, since it uses less digits than its factorization.

6605662513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36495554.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 6605662513 is about 81275.2269329345. The cubic root of 6605662513 is about 1876.3137471874.

The spelling of 6605662513 in words is "six billion, six hundred five million, six hundred sixty-two thousand, five hundred thirteen".