6815560 has 16 divisors (see below), whose sum is σ = 15335100. Its totient is φ = 2726208.

The previous prime is 6815533. The next prime is 6815561. The reversal of 6815560 is 655186.

It can be written as a sum of positive squares in 2 ways, for example, as 6687396 + 128164 = 2586^2 + 358^2 .

It is a super-2 number, since 2×6815560² = 92903716227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6815561) 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, 85155 + ... + 85234.

Almost surely, 2^6815560 is an apocalyptic number.

It is an amenable number.

6815560 is an abundant number, since it is smaller than the sum of its proper divisors (8519540).

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

6815560 is a wasteful number, since it uses less digits than its factorization.

6815560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170400 (or 170396 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 6815560 is about 2610.6627511036. The cubic root of 6815560 is about 189.5980421976.

It can be divided in two parts, 681 and 5560, that added together give a square (6241 = 79²).

The spelling of 6815560 in words is "six million, eight hundred fifteen thousand, five hundred sixty".