6555221620570 has 64 divisors (see below), whose sum is σ = 13536256029696. Its totient is φ = 2238968252160.

The previous prime is 6555221620567. The next prime is 6555221620603. The reversal of 6555221620570 is 750261225556.

It is a self number, because there is not a number n which added to its sum of digits gives 6555221620570.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309826432 + ... + 309847588.

It is an arithmetic number, because the mean of its divisors is an integer number (211504000464).

Almost surely, 2^{6555221620570} is an apocalyptic number.

6555221620570 is an abundant number, since it is smaller than the sum of its proper divisors (6981034409126).

6555221620570 is a wasteful number, since it uses less digits than its factorization.

6555221620570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37775.

The product of its (nonzero) digits is 1260000, while the sum is 46.

The spelling of 6555221620570 in words is "six trillion, five hundred fifty-five billion, two hundred twenty-one million, six hundred twenty thousand, five hundred seventy".