28166741065 has 4 divisors (see below), whose sum is σ = 33800089284. Its totient is φ = 22533392848.

The previous prime is 28166741041. The next prime is 28166741077. The reversal of 28166741065 is 56014766182.

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 11451354121 + 16715386944 = 107011^2 + 129288^2 .

It is a cyclic number.

It is not a de Polignac number, because 28166741065 - 2²⁹ = 27629870153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2816674102 + ... + 2816674111.

It is an arithmetic number, because the mean of its divisors is an integer number (8450022321).

Almost surely, 2^28166741065 is an apocalyptic number.

It is an amenable number.

28166741065 is a deficient number, since it is larger than the sum of its proper divisors (5633348219).

28166741065 is an equidigital number, since it uses as much as digits as its factorization.

28166741065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5633348218.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 28166741065 in words is "twenty-eight billion, one hundred sixty-six million, seven hundred forty-one thousand, sixty-five".