6221663855 has 8 divisors (see below), whose sum is σ = 8144723664. Its totient is φ = 4524846400.

The previous prime is 6221663843. The next prime is 6221663863. The reversal of 6221663855 is 5583661226.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6221663855 is a prime.

It is a super-2 number, since 2×6221663855² = 77418202249226922050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56560526 + ... + 56560635.

It is an arithmetic number, because the mean of its divisors is an integer number (1018090458).

Almost surely, 2^6221663855 is an apocalyptic number.

6221663855 is a deficient number, since it is larger than the sum of its proper divisors (1923059809).

6221663855 is a wasteful number, since it uses less digits than its factorization.

6221663855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113121177.

The product of its digits is 518400, while the sum is 44.

The square root of 6221663855 is about 78877.5243970042. The cubic root of 6221663855 is about 1839.2277650073.

It can be divided in two parts, 6221 and 663855, that added together give a palindrome (670076).

The spelling of 6221663855 in words is "six billion, two hundred twenty-one million, six hundred sixty-three thousand, eight hundred fifty-five".