6622556243 has 4 divisors (see below), whose sum is σ = 6684449400. Its totient is φ = 6560663088.

The previous prime is 6622556231. The next prime is 6622556251. The reversal of 6622556243 is 3426552266.

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

It is a cyclic number.

It is not a de Polignac number, because 6622556243 - 2⁸ = 6622555987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6622556243.

It is not an unprimeable number, because it can be changed into a prime (6622556263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30946418 + ... + 30946631.

It is an arithmetic number, because the mean of its divisors is an integer number (1671112350).

Almost surely, 2^6622556243 is an apocalyptic number.

6622556243 is a deficient number, since it is larger than the sum of its proper divisors (61893157).

6622556243 is a wasteful number, since it uses less digits than its factorization.

6622556243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61893156.

The product of its digits is 518400, while the sum is 41.

The square root of 6622556243 is about 81379.0897159706. The cubic root of 6622556243 is about 1877.9119191606.

The spelling of 6622556243 in words is "six billion, six hundred twenty-two million, five hundred fifty-six thousand, two hundred forty-three".