6605566500660 has 48 divisors (see below), whose sum is σ = 18495821875776. Its totient is φ = 1761461955072.

The previous prime is 6605566500629. The next prime is 6605566500667. The reversal of 6605566500660 is 660056655066.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6605566500667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4346892 + ... + 5666268.

It is an arithmetic number, because the mean of its divisors is an integer number (385329622412).

Almost surely, 2^{6605566500660} is an apocalyptic number.

6605566500660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6605566500660 is an abundant number, since it is smaller than the sum of its proper divisors (11890255375116).

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

6605566500660 is a wasteful number, since it uses less digits than its factorization.

6605566500660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402832 (or 1402830 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 51.

The spelling of 6605566500660 in words is "six trillion, six hundred five billion, five hundred sixty-six million, five hundred thousand, six hundred sixty".