7665888660 has 144 divisors (see below), whose sum is σ = 22334909184. Its totient is φ = 1963118592.

The previous prime is 7665888647. The next prime is 7665888689. The reversal of 7665888660 is 668885667.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 7665888594 and 7665888603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20887797 + ... + 20888163.

It is an arithmetic number, because the mean of its divisors is an integer number (155103536).

Almost surely, 2^7665888660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7665888660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11167454592).

7665888660 is an abundant number, since it is smaller than the sum of its proper divisors (14669020524).

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

7665888660 is a wasteful number, since it uses less digits than its factorization.

7665888660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 60.

The square root of 7665888660 is about 87555.0607332323. The cubic root of 7665888660 is about 1971.7605312062.

The spelling of 7665888660 in words is "seven billion, six hundred sixty-five million, eight hundred eighty-eight thousand, six hundred sixty".