3663655 has 4 divisors (see below), whose sum is σ = 4396392. Its totient is φ = 2930920.

The previous prime is 3663617. The next prime is 3663659. The reversal of 3663655 is 5563663.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-3663655 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3663655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3663659) 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, 366361 + ... + 366370.

It is an arithmetic number, because the mean of its divisors is an integer number (1099098).

Almost surely, 2^3663655 is an apocalyptic number.

3663655 is a deficient number, since it is larger than the sum of its proper divisors (732737).

3663655 is an equidigital number, since it uses as much as digits as its factorization.

3663655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732736.

The product of its digits is 48600, while the sum is 34.

The square root of 3663655 is about 1914.0676581563. The cubic root of 3663655 is about 154.1599367243.

The spelling of 3663655 in words is "three million, six hundred sixty-three thousand, six hundred fifty-five".