3663960655 has 4 divisors (see below), whose sum is σ = 4396752792. Its totient is φ = 2931168520.

The previous prime is 3663960647. The next prime is 3663960673. The reversal of 3663960655 is 5560693663.

It is a happy number.

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

It is not a de Polignac number, because 3663960655 - 2³ = 3663960647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3663960599 and 3663960608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366396061 + ... + 366396070.

It is an arithmetic number, because the mean of its divisors is an integer number (1099188198).

Almost surely, 2^3663960655 is an apocalyptic number.

3663960655 is a deficient number, since it is larger than the sum of its proper divisors (732792137).

3663960655 is an equidigital number, since it uses as much as digits as its factorization.

3663960655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732792136.

The product of its (nonzero) digits is 2624400, while the sum is 49.

The square root of 3663960655 is about 60530.6588019658. The cubic root of 3663960655 is about 1541.6422374053.

The spelling of 3663960655 in words is "three billion, six hundred sixty-three million, nine hundred sixty thousand, six hundred fifty-five".