11557066650665 has 16 divisors (see below), whose sum is σ = 13989941312256. Its totient is φ = 9165007598400.

The previous prime is 11557066650653. The next prime is 11557066650673. The reversal of 11557066650665 is 56605666075511.

It is a happy number.

It is not a de Polignac number, because 11557066650665 - 2²² = 11557062456361 is a prime.

It is a super-2 number, since 2×11557066650665² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20249477 + ... + 20812386.

It is an arithmetic number, because the mean of its divisors is an integer number (874371332016).

Almost surely, 2^{11557066650665} is an apocalyptic number.

It is an amenable number.

11557066650665 is a deficient number, since it is larger than the sum of its proper divisors (2432874661591).

11557066650665 is a wasteful number, since it uses less digits than its factorization.

11557066650665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41062360.

The product of its (nonzero) digits is 34020000, while the sum is 59.

The spelling of 11557066650665 in words is "eleven trillion, five hundred fifty-seven billion, sixty-six million, six hundred fifty thousand, six hundred sixty-five".