10661565392 has 20 divisors (see below), whose sum is σ = 21215075556. Its totient is φ = 5186707200.

The previous prime is 10661565379. The next prime is 10661565413. The reversal of 10661565392 is 29356516601.

It can be written as a sum of positive squares in 2 ways, for example, as 6599287696 + 4062277696 = 81236^2 + 63736^2 .

It is a super-2 number, since 2×10661565392² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9004109 + ... + 9005292.

Almost surely, 2^10661565392 is an apocalyptic number.

It is an amenable number.

10661565392 is a deficient number, since it is larger than the sum of its proper divisors (10553510164).

10661565392 is a wasteful number, since it uses less digits than its factorization.

10661565392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18009446 (or 18009440 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 10661565392 in words is "ten billion, six hundred sixty-one million, five hundred sixty-five thousand, three hundred ninety-two".