6615612745660 has 24 divisors (see below), whose sum is σ = 13893027137136. Its totient is φ = 2646199313280.

The previous prime is 6615612745627. The next prime is 6615612745667. The reversal of 6615612745660 is 665472165166.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6615612745667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1664506 + ... + 4000225.

It is an arithmetic number, because the mean of its divisors is an integer number (578876130714).

Almost surely, 2^{6615612745660} is an apocalyptic number.

It is an amenable number.

6615612745660 is an abundant number, since it is smaller than the sum of its proper divisors (7277414391476).

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

6615612745660 is a wasteful number, since it uses less digits than its factorization.

6615612745660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723133 (or 5723131 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 6615612745660 in words is "six trillion, six hundred fifteen billion, six hundred twelve million, seven hundred forty-five thousand, six hundred sixty".