10665516555664 has 20 divisors (see below), whose sum is σ = 20664855909340. Its totient is φ = 5332650514560.

The previous prime is 10665516555653. The next prime is 10665516555667. The reversal of 10665516555664 is 46655561556601.

It can be written as a sum of positive squares in 2 ways, for example, as 4381871397264 + 6283645158400 = 2093292^2 + 2506720^2 .

It is a super-2 number, since 2×10665516555664² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10665516555667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5915667 + ... + 7505074.

It is an arithmetic number, because the mean of its divisors is an integer number (1033242795467).

Almost surely, 2^{10665516555664} is an apocalyptic number.

It is an amenable number.

10665516555664 is a deficient number, since it is larger than the sum of its proper divisors (9999339353676).

10665516555664 is a wasteful number, since it uses less digits than its factorization.

10665516555664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13470418 (or 13470412 counting only the distinct ones).

The product of its (nonzero) digits is 97200000, while the sum is 61.

The spelling of 10665516555664 in words is "ten trillion, six hundred sixty-five billion, five hundred sixteen million, five hundred fifty-five thousand, six hundred sixty-four".