6557007555 has 96 divisors (see below), whose sum is σ = 13597009920. Its totient is φ = 2858042880.

The previous prime is 6557007497. The next prime is 6557007557. The reversal of 6557007555 is 5557007556.

6557007555 is a `hidden beast` number, since 6 + 5 + 570 + 0 + 75 + 5 + 5 = 666.

It is not a de Polignac number, because 6557007555 - 2⁸ = 6557007299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6557007555.

It is not an unprimeable number, because it can be changed into a prime (6557007557) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2599695 + ... + 2602215.

It is an arithmetic number, because the mean of its divisors is an integer number (141635520).

Almost surely, 2^6557007555 is an apocalyptic number.

6557007555 is an abundant number, since it is smaller than the sum of its proper divisors (7040002365).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6557007555 is a wasteful number, since it uses less digits than its factorization.

6557007555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 918750, while the sum is 45.

The square root of 6557007555 is about 80975.3515274864. The cubic root of 6557007555 is about 1871.6956371201.

Subtracting from 6557007555 its reverse (5557007556), we obtain a palindrome (999999999).

The spelling of 6557007555 in words is "six billion, five hundred fifty-seven million, seven thousand, five hundred fifty-five".