3665636365663 has 8 divisors (see below), whose sum is σ = 3788021190096. Its totient is φ = 3544939608000.

The previous prime is 3665636365609. The next prime is 3665636365679.

It is a happy number.

3665636365663 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3665636365663 - 2¹⁷ = 3665636234591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3665636365595 and 3665636365604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665636365603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422012278 + ... + 422020963.

It is an arithmetic number, because the mean of its divisors is an integer number (473502648762).

Almost surely, 2^{3665636365663} is an apocalyptic number.

3665636365663 is a deficient number, since it is larger than the sum of its proper divisors (122384824433).

3665636365663 is a wasteful number, since it uses less digits than its factorization.

3665636365663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844033385.

The product of its digits is 566870400, while the sum is 64.

The spelling of 3665636365663 in words is "three trillion, six hundred sixty-five billion, six hundred thirty-six million, three hundred sixty-five thousand, six hundred sixty-three".