6566165572 has 12 divisors (see below), whose sum is σ = 11523717100. Its totient is φ = 3273674976.

The previous prime is 6566165569. The next prime is 6566165581. The reversal of 6566165572 is 2755616656.

It can be written as a sum of positive squares in 2 ways, for example, as 1635878916 + 4930286656 = 40446^2 + 70216^2 .

It is a super-2 number, since 2×6566165572² = 86229060637836174368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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, 2350383 + ... + 2353174.

Almost surely, 2^6566165572 is an apocalyptic number.

It is an amenable number.

6566165572 is a deficient number, since it is larger than the sum of its proper divisors (4957551528).

6566165572 is a wasteful number, since it uses less digits than its factorization.

6566165572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703910 (or 4703908 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 49.

The square root of 6566165572 is about 81031.8799732550. The cubic root of 6566165572 is about 1872.5666160615.

The spelling of 6566165572 in words is "six billion, five hundred sixty-six million, one hundred sixty-five thousand, five hundred seventy-two".