6543222661 has 8 divisors (see below), whose sum is σ = 6673212000. Its totient is φ = 6413869680.

The previous prime is 6543222649. The next prime is 6543222691. The reversal of 6543222661 is 1662223456.

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

It is a cyclic number.

It is not a de Polignac number, because 6543222661 - 2¹⁵ = 6543189893 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 6543222661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543222691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138295 + ... + 179476.

It is an arithmetic number, because the mean of its divisors is an integer number (834151500).

Almost surely, 2^6543222661 is an apocalyptic number.

It is an amenable number.

6543222661 is a deficient number, since it is larger than the sum of its proper divisors (129989339).

6543222661 is a wasteful number, since it uses less digits than its factorization.

6543222661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318179.

The product of its digits is 103680, while the sum is 37.

The square root of 6543222661 is about 80890.1889044648. The cubic root of 6543222661 is about 1870.3830857474.

The spelling of 6543222661 in words is "six billion, five hundred forty-three million, two hundred twenty-two thousand, six hundred sixty-one".