6642555454222 has 8 divisors (see below), whose sum is σ = 9978421518936. Its totient is φ = 3316414947912.

The previous prime is 6642555454211. The next prime is 6642555454273. The reversal of 6642555454222 is 2224545552466.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6642555454222.

It is a congruent 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, 2431387893 + ... + 2431390624.

It is an arithmetic number, because the mean of its divisors is an integer number (1247302689867).

Almost surely, 2^{6642555454222} is an apocalyptic number.

6642555454222 is a deficient number, since it is larger than the sum of its proper divisors (3335866064714).

6642555454222 is a wasteful number, since it uses less digits than its factorization.

6642555454222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862779202.

The product of its digits is 23040000, while the sum is 52.

The spelling of 6642555454222 in words is "six trillion, six hundred forty-two billion, five hundred fifty-five million, four hundred fifty-four thousand, two hundred twenty-two".