3655217665 has 16 divisors (see below), whose sum is σ = 4788463680. Its totient is φ = 2656422720.

The previous prime is 3655217653. The next prime is 3655217711. The reversal of 3655217665 is 5667125563.

It is not a de Polignac number, because 3655217665 - 2⁵ = 3655217633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55342 + ... + 101848.

It is an arithmetic number, because the mean of its divisors is an integer number (299278980).

Almost surely, 2^3655217665 is an apocalyptic number.

It is an amenable number.

3655217665 is a deficient number, since it is larger than the sum of its proper divisors (1133246015).

3655217665 is a wasteful number, since it uses less digits than its factorization.

3655217665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47952.

The product of its digits is 1134000, while the sum is 46.

The square root of 3655217665 is about 60458.3961497491. The cubic root of 3655217665 is about 1540.4150319231.

The spelling of 3655217665 in words is "three billion, six hundred fifty-five million, two hundred seventeen thousand, six hundred sixty-five".