3665540455663 has 16 divisors (see below), whose sum is σ = 3991612924800. Its totient is φ = 3352788845280.

The previous prime is 3665540455649. The next prime is 3665540455691.

3665540455663 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3665540455663 is a prime.

It is a super-2 number, since 2×3665540455663² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3665540455598 and 3665540455607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665540455693) 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, 39080220 + ... + 39173902.

It is an arithmetic number, because the mean of its divisors is an integer number (249475807800).

Almost surely, 2^{3665540455663} is an apocalyptic number.

3665540455663 is a deficient number, since it is larger than the sum of its proper divisors (326072469137).

3665540455663 is a wasteful number, since it uses less digits than its factorization.

3665540455663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164742.

The product of its (nonzero) digits is 116640000, while the sum is 58.

The spelling of 3665540455663 in words is "three trillion, six hundred sixty-five billion, five hundred forty million, four hundred fifty-five thousand, six hundred sixty-three".