6576221620 has 48 divisors (see below), whose sum is σ = 13877756928. Its totient is φ = 2617632000.

The previous prime is 6576221599. The next prime is 6576221629. The reversal of 6576221620 is 261226756.

It is a self number, because there is not a number n which added to its sum of digits gives 6576221620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6576221629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5511744 + ... + 5512936.

It is an arithmetic number, because the mean of its divisors is an integer number (289119936).

Almost surely, 2^6576221620 is an apocalyptic number.

It is an amenable number.

6576221620 is an abundant number, since it is smaller than the sum of its proper divisors (7301535308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6576221620 is a wasteful number, since it uses less digits than its factorization.

6576221620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 6576221620 is about 81093.9061828939. The cubic root of 6576221620 is about 1873.5220704405.

The spelling of 6576221620 in words is "six billion, five hundred seventy-six million, two hundred twenty-one thousand, six hundred twenty".