6556616615575 has 24 divisors (see below), whose sum is σ = 8992242945728. Its totient is φ = 4710949476480.

The previous prime is 6556616615573. The next prime is 6556616615587. The reversal of 6556616615575 is 5755166166556.

It is a happy number.

It is not a de Polignac number, because 6556616615575 - 2¹ = 6556616615573 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 (6556616615573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272612367 + ... + 272636416.

Almost surely, 2^{6556616615575} is an apocalyptic number.

6556616615575 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6556616615575 is a deficient number, since it is larger than the sum of its proper divisors (2435626330153).

6556616615575 is a wasteful number, since it uses less digits than its factorization.

6556616615575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545248843 (or 545248838 counting only the distinct ones).

The product of its digits is 170100000, while the sum is 64.

It can be divided in two parts, 655661661 and 5575, that added together give a square (655667236 = 25606²).

The spelling of 6556616615575 in words is "six trillion, five hundred fifty-six billion, six hundred sixteen million, six hundred fifteen thousand, five hundred seventy-five".