6565222620 has 72 divisors (see below), whose sum is σ = 21724925040. Its totient is φ = 1591568640.

The previous prime is 6565222619. The next prime is 6565222669. The reversal of 6565222620 is 262225656.

6565222620 is a `hidden beast` number, since 6 + 5 + 6 + 5 + 2 + 22 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1655905 + ... + 1659864.

It is an arithmetic number, because the mean of its divisors is an integer number (301735070).

Almost surely, 2^6565222620 is an apocalyptic number.

6565222620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6565222620 is an abundant number, since it is smaller than the sum of its proper divisors (15159702420).

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

6565222620 is a wasteful number, since it uses less digits than its factorization.

6565222620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315795 (or 3315790 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 6565222620 is about 81026.0613629960. The cubic root of 6565222620 is about 1872.4769734358.

The spelling of 6565222620 in words is "six billion, five hundred sixty-five million, two hundred twenty-two thousand, six hundred twenty".