6646402222 has 4 divisors (see below), whose sum is σ = 9969603336. Its totient is φ = 3323201110.

The previous prime is 6646402187. The next prime is 6646402271. The reversal of 6646402222 is 2222046466.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1661600554 + ... + 1661600557.

It is an arithmetic number, because the mean of its divisors is an integer number (2492400834).

Almost surely, 2^6646402222 is an apocalyptic number.

6646402222 is a deficient number, since it is larger than the sum of its proper divisors (3323201114).

6646402222 is a wasteful number, since it uses less digits than its factorization.

6646402222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323201113.

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 6646402222 is about 81525.4697747888. The cubic root of 6646402222 is about 1880.1631650674.

Adding to 6646402222 its reverse (2222046466), we get a palindrome (8868448688).

The spelling of 6646402222 in words is "six billion, six hundred forty-six million, four hundred two thousand, two hundred twenty-two".