3220616665 has 16 divisors (see below), whose sum is σ = 4418444160. Its totient is φ = 2207623680.

The previous prime is 3220616617. The next prime is 3220616671. The reversal of 3220616665 is 5666160223.

It is not a de Polignac number, because 3220616665 - 2¹³ = 3220608473 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91306 + ... + 121564.

It is an arithmetic number, because the mean of its divisors is an integer number (276152760).

Almost surely, 2^3220616665 is an apocalyptic number.

3220616665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3220616665 is a deficient number, since it is larger than the sum of its proper divisors (1197827495).

3220616665 is a wasteful number, since it uses less digits than its factorization.

3220616665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33312.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 3220616665 is about 56750.4772226631. The cubic root of 3220616665 is about 1476.7705124335.

Adding to 3220616665 its reverse (5666160223), we get a palindrome (8886776888).

The spelling of 3220616665 in words is "three billion, two hundred twenty million, six hundred sixteen thousand, six hundred sixty-five".