6604672512861 has 6 divisors (see below), whose sum is σ = 9540082518590. Its totient is φ = 4403115008568.

The previous prime is 6604672512827. The next prime is 6604672512887. The reversal of 6604672512861 is 1682152764066.

6604672512861 is a `hidden beast` number, since 6 + 6 + 0 + 4 + 67 + 2 + 512 + 8 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6303584361636 + 301088151225 = 2510694^2 + 548715^2 .

It is not a de Polignac number, because 6604672512861 - 2⁹ = 6604672512349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6604672512798 and 6604672512807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6604672512811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 366926250706 + ... + 366926250723.

Almost surely, 2^{6604672512861} is an apocalyptic number.

It is an amenable number.

6604672512861 is a deficient number, since it is larger than the sum of its proper divisors (2935410005729).

6604672512861 is a wasteful number, since it uses less digits than its factorization.

6604672512861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733852501435 (or 733852501432 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 6604672512861 in words is "six trillion, six hundred four billion, six hundred seventy-two million, five hundred twelve thousand, eight hundred sixty-one".