6643402322 has 4 divisors (see below), whose sum is σ = 9965103486. Its totient is φ = 3321701160.

The previous prime is 6643402291. The next prime is 6643402369. The reversal of 6643402322 is 2232043466.

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

It can be written as a sum of positive squares in only one way, i.e., 4823441401 + 1819960921 = 69451^2 + 42661^2 .

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 as a sum of consecutive naturals, namely, 1660850579 + ... + 1660850582.

Almost surely, 2^6643402322 is an apocalyptic number.

6643402322 is a deficient number, since it is larger than the sum of its proper divisors (3321701164).

6643402322 is a wasteful number, since it uses less digits than its factorization.

6643402322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321701163.

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 6643402322 is about 81507.0691535403. The cubic root of 6643402322 is about 1879.8802475781.

Adding to 6643402322 its reverse (2232043466), we get a palindrome (8875445788).

The spelling of 6643402322 in words is "six billion, six hundred forty-three million, four hundred two thousand, three hundred twenty-two".