6565065660 has 96 divisors (see below), whose sum is σ = 20440929600. Its totient is φ = 1749288960.

The previous prime is 6565065653. The next prime is 6565065679. The reversal of 6565065660 is 665605656.

It is a super-2 number, since 2×6565065660² = 86200174240222471200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 795636 + ... + 803844.

It is an arithmetic number, because the mean of its divisors is an integer number (212926350).

Almost surely, 2^6565065660 is an apocalyptic number.

6565065660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6565065660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10220464800).

6565065660 is an abundant number, since it is smaller than the sum of its proper divisors (13875863940).

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

6565065660 is a wasteful number, since it uses less digits than its factorization.

6565065660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9708 (or 9700 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The square root of 6565065660 is about 81025.0927799531. The cubic root of 6565065660 is about 1872.4620510514.

The spelling of 6565065660 in words is "six billion, five hundred sixty-five million, sixty-five thousand, six hundred sixty".