6646556522 has 16 divisors (see below), whose sum is σ = 10005515520. Its totient is φ = 3311407008.

The previous prime is 6646556513. The next prime is 6646556599. The reversal of 6646556522 is 2256556466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659054 + ... + 669062.

It is an arithmetic number, because the mean of its divisors is an integer number (625344720).

Almost surely, 2^6646556522 is an apocalyptic number.

6646556522 is a deficient number, since it is larger than the sum of its proper divisors (3358958998).

6646556522 is a wasteful number, since it uses less digits than its factorization.

6646556522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11165.

The product of its digits is 2592000, while the sum is 47.

The square root of 6646556522 is about 81526.4160993233. The cubic root of 6646556522 is about 1880.1777146398.

The spelling of 6646556522 in words is "six billion, six hundred forty-six million, five hundred fifty-six thousand, five hundred twenty-two".