6657115513 has 4 divisors (see below), whose sum is σ = 6737321808. Its totient is φ = 6576909220.

The previous prime is 6657115457. The next prime is 6657115523. The reversal of 6657115513 is 3155117566.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 6657115513 - 2⁹ = 6657115001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6657115523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40103023 + ... + 40103188.

It is an arithmetic number, because the mean of its divisors is an integer number (1684330452).

Almost surely, 2^6657115513 is an apocalyptic number.

It is an amenable number.

6657115513 is a deficient number, since it is larger than the sum of its proper divisors (80206295).

6657115513 is an equidigital number, since it uses as much as digits as its factorization.

6657115513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80206294.

The product of its digits is 94500, while the sum is 40.

The square root of 6657115513 is about 81591.1484966353. The cubic root of 6657115513 is about 1881.1728302204.

The spelling of 6657115513 in words is "six billion, six hundred fifty-seven million, one hundred fifteen thousand, five hundred thirteen".