10665565556 has 6 divisors (see below), whose sum is σ = 18664739730. Its totient is φ = 5332782776.

The previous prime is 10665565513. The next prime is 10665565571. The reversal of 10665565556 is 65556556601.

It can be written as a sum of positive squares in only one way, i.e., 7317091600 + 3348473956 = 85540^2 + 57866^2 .

It is a super-2 number, since 2×10665565556² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333195691 + ... + 1333195698.

It is an arithmetic number, because the mean of its divisors is an integer number (3110789955).

Almost surely, 2^10665565556 is an apocalyptic number.

It is an amenable number.

10665565556 is a deficient number, since it is larger than the sum of its proper divisors (7999174174).

10665565556 is a wasteful number, since it uses less digits than its factorization.

10665565556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666391393 (or 2666391391 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 50.

It can be divided in two parts, 10 and 665565556, that added together give a palindrome (665565566).

The spelling of 10665565556 in words is "ten billion, six hundred sixty-five million, five hundred sixty-five thousand, five hundred fifty-six".