6557613217 has 4 divisors (see below), whose sum is σ = 6558320896. Its totient is φ = 6556905540.

The previous prime is 6557613211. The next prime is 6557613239. The reversal of 6557613217 is 7123167556.

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 6557613217 - 2²³ = 6549224609 is a prime.

It is a super-2 number, since 2×6557613217² = 86004582207546178178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6557613211) 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, 339753 + ... + 358534.

It is an arithmetic number, because the mean of its divisors is an integer number (1639580224).

Almost surely, 2^6557613217 is an apocalyptic number.

It is an amenable number.

6557613217 is a deficient number, since it is larger than the sum of its proper divisors (707679).

6557613217 is an equidigital number, since it uses as much as digits as its factorization.

6557613217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707678.

The product of its digits is 264600, while the sum is 43.

The square root of 6557613217 is about 80979.0912334783. The cubic root of 6557613217 is about 1871.7532640183.

The spelling of 6557613217 in words is "six billion, five hundred fifty-seven million, six hundred thirteen thousand, two hundred seventeen".