6615565240 has 16 divisors (see below), whose sum is σ = 14885021880. Its totient is φ = 2646226080.

The previous prime is 6615565211. The next prime is 6615565241. The reversal of 6615565240 is 425655166.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 165389131 = 6615565240 / (6 + 6 + 1 + 5 + 5 + 6 + 5 + 2 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 6615565193 and 6615565202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6615565241) 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, 82694526 + ... + 82694605.

Almost surely, 2^6615565240 is an apocalyptic number.

It is an amenable number.

6615565240 is an abundant number, since it is smaller than the sum of its proper divisors (8269456640).

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

6615565240 is a wasteful number, since it uses less digits than its factorization.

6615565240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165389142 (or 165389138 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 6615565240 is about 81336.1250613772. The cubic root of 6615565240 is about 1877.2508899084.

The spelling of 6615565240 in words is "six billion, six hundred fifteen million, five hundred sixty-five thousand, two hundred forty".