6220863665 has 4 divisors (see below), whose sum is σ = 7465036404. Its totient is φ = 4976690928.

The previous prime is 6220863643. The next prime is 6220863673. The reversal of 6220863665 is 5663680226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5663680226 = 2 ⋅2831840113.

It can be written as a sum of positive squares in 2 ways, for example, as 4699239601 + 1521624064 = 68551^2 + 39008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6220863665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622086362 + ... + 622086371.

It is an arithmetic number, because the mean of its divisors is an integer number (1866259101).

Almost surely, 2^6220863665 is an apocalyptic number.

It is an amenable number.

6220863665 is a deficient number, since it is larger than the sum of its proper divisors (1244172739).

6220863665 is a wasteful number, since it uses less digits than its factorization.

6220863665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244172738.

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 6220863665 is about 78872.4518764315. The cubic root of 6220863665 is about 1839.1489117831.

The spelling of 6220863665 in words is "six billion, two hundred twenty million, eight hundred sixty-three thousand, six hundred sixty-five".