3663616665 has 8 divisors (see below), whose sum is σ = 5861786688. Its totient is φ = 1953928880.

The previous prime is 3663616577. The next prime is 3663616669. The reversal of 3663616665 is 5666163663.

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

It is not a de Polignac number, because 3663616665 - 2⁹ = 3663616153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3663616669) 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, 122120541 + ... + 122120570.

It is an arithmetic number, because the mean of its divisors is an integer number (732723336).

Almost surely, 2^3663616665 is an apocalyptic number.

It is an amenable number.

3663616665 is a deficient number, since it is larger than the sum of its proper divisors (2198170023).

3663616665 is a wasteful number, since it uses less digits than its factorization.

3663616665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244241119.

The product of its digits is 2099520, while the sum is 48.

The square root of 3663616665 is about 60527.8172826346. The cubic root of 3663616665 is about 1541.5939903342.

It can be divided in two parts, 36636 and 16665, that added together give a triangular number (53301 = T₃₂₆).

The spelling of 3663616665 in words is "three billion, six hundred sixty-three million, six hundred sixteen thousand, six hundred sixty-five".