10665595521 has 24 divisors (see below), whose sum is σ = 17788219904. Its totient is φ = 6031791360.

The previous prime is 10665595519. The next prime is 10665595571. The reversal of 10665595521 is 12559556601.

10665595521 is a `hidden beast` number, since 1 + 0 + 6 + 6 + 5 + 595 + 52 + 1 = 666.

It is not a de Polignac number, because 10665595521 - 2¹ = 10665595519 is a prime.

It is a super-2 number, since 2×10665595521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10665595571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 866545 + ... + 878766.

Almost surely, 2^10665595521 is an apocalyptic number.

It is an amenable number.

10665595521 is a deficient number, since it is larger than the sum of its proper divisors (7122624383).

10665595521 is a wasteful number, since it uses less digits than its factorization.

10665595521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745421 (or 1745418 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 45.

The spelling of 10665595521 in words is "ten billion, six hundred sixty-five million, five hundred ninety-five thousand, five hundred twenty-one".