28166741077 has 2 divisors, whose sum is σ = 28166741078. Its totient is φ = 28166741076.

The previous prime is 28166741041. The next prime is 28166741089. The reversal of 28166741077 is 77014766182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23057207716 + 5109533361 = 151846^2 + 71481^2 .

It is a cyclic number.

It is not a de Polignac number, because 28166741077 - 2¹⁵ = 28166708309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28166741077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28166741017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14083370538 + 14083370539.

It is an arithmetic number, because the mean of its divisors is an integer number (14083370539).

Almost surely, 2^28166741077 is an apocalyptic number.

It is an amenable number.

28166741077 is a deficient number, since it is larger than the sum of its proper divisors (1).

28166741077 is an equidigital number, since it uses as much as digits as its factorization.

28166741077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 28166741077 in words is "twenty-eight billion, one hundred sixty-six million, seven hundred forty-one thousand, seventy-seven".