3665556555663 has 16 divisors (see below), whose sum is σ = 5027965547616. Its totient is φ = 2373648721920.

The previous prime is 3665556555653. The next prime is 3665556555677.

3665556555663 is nontrivially palindromic in base 10.

3665556555663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3665556555663 - 2¹² = 3665556551567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3665556555594 and 3665556555603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665556555653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27778218 + ... + 27909863.

It is an arithmetic number, because the mean of its divisors is an integer number (314247846726).

Almost surely, 2^{3665556555663} is an apocalyptic number.

3665556555663 is a deficient number, since it is larger than the sum of its proper divisors (1362408991953).

3665556555663 is a wasteful number, since it uses less digits than its factorization.

3665556555663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55688714.

The product of its digits is 1093500000, while the sum is 66.

The spelling of 3665556555663 in words is "three trillion, six hundred sixty-five billion, five hundred fifty-six million, five hundred fifty-five thousand, six hundred sixty-three".