6547666061 has 4 divisors (see below), whose sum is σ = 6547897692. Its totient is φ = 6547434432.

The previous prime is 6547666001. The next prime is 6547666091. The reversal of 6547666061 is 1606667456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4373309161 + 2174356900 = 66131^2 + 46630^2 .

It is a cyclic number.

It is not a de Polignac number, because 6547666061 - 2¹⁸ = 6547403917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6547665997 and 6547666015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6547666001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66380 + ... + 132293.

It is an arithmetic number, because the mean of its divisors is an integer number (1636974423).

Almost surely, 2^6547666061 is an apocalyptic number.

It is an amenable number.

6547666061 is a deficient number, since it is larger than the sum of its proper divisors (231631).

6547666061 is a wasteful number, since it uses less digits than its factorization.

6547666061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231630.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The square root of 6547666061 is about 80917.6498731890. The cubic root of 6547666061 is about 1870.8063725631.

The spelling of 6547666061 in words is "six billion, five hundred forty-seven million, six hundred sixty-six thousand, sixty-one".