6566246660 has 12 divisors (see below), whose sum is σ = 13789118028. Its totient is φ = 2626498656.

The previous prime is 6566246629. The next prime is 6566246693. The reversal of 6566246660 is 666426656.

It can be written as a sum of positive squares in 2 ways, for example, as 4489804036 + 2076442624 = 67006^2 + 45568^2 .

It is a super-2 number, since 2×6566246660² = 86231190399922311200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164156147 + ... + 164156186.

It is an arithmetic number, because the mean of its divisors is an integer number (1149093169).

Almost surely, 2^6566246660 is an apocalyptic number.

It is an amenable number.

6566246660 is an abundant number, since it is smaller than the sum of its proper divisors (7222871368).

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

6566246660 is a wasteful number, since it uses less digits than its factorization.

6566246660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328312342 (or 328312340 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 47.

The square root of 6566246660 is about 81032.3803179939. The cubic root of 6566246660 is about 1872.5743243683.

The spelling of 6566246660 in words is "six billion, five hundred sixty-six million, two hundred forty-six thousand, six hundred sixty".