28666513349 has 8 divisors (see below), whose sum is σ = 28975117560. Its totient is φ = 28359504576.

The previous prime is 28666513331. The next prime is 28666513363. The reversal of 28666513349 is 94331566682.

It can be written as a sum of positive squares in 4 ways, for example, as 11191524100 + 17474989249 = 105790^2 + 132193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28666513349 - 2¹² = 28666509253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28666513349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28666513319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362714 + ... + 434619.

It is an arithmetic number, because the mean of its divisors is an integer number (3621889695).

Almost surely, 2^28666513349 is an apocalyptic number.

It is an amenable number.

28666513349 is a deficient number, since it is larger than the sum of its proper divisors (308604211).

28666513349 is a wasteful number, since it uses less digits than its factorization.

28666513349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797719.

The product of its digits is 5598720, while the sum is 53.

The spelling of 28666513349 in words is "twenty-eight billion, six hundred sixty-six million, five hundred thirteen thousand, three hundred forty-nine".