6566650064 has 40 divisors (see below), whose sum is σ = 13827318120. Its totient is φ = 3002946048.

The previous prime is 6566650039. The next prime is 6566650067. The reversal of 6566650064 is 4600566656.

It can be written as a sum of positive squares in 4 ways, for example, as 101203600 + 6465446464 = 10060^2 + 80408^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6566649997 and 6566650024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566650067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122147 + ... + 167490.

It is an arithmetic number, because the mean of its divisors is an integer number (345682953).

Almost surely, 2^6566650064 is an apocalyptic number.

It is an amenable number.

6566650064 is an abundant number, since it is smaller than the sum of its proper divisors (7260668056).

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

6566650064 is a wasteful number, since it uses less digits than its factorization.

6566650064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289767 (or 289761 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The square root of 6566650064 is about 81034.8694328559. The cubic root of 6566650064 is about 1872.6126714151.

The spelling of 6566650064 in words is "six billion, five hundred sixty-six million, six hundred fifty thousand, sixty-four".