28666032973 has 2 divisors, whose sum is σ = 28666032974. Its totient is φ = 28666032972.

The previous prime is 28666032919. The next prime is 28666033021. The reversal of 28666032973 is 37923066682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27756226404 + 909806569 = 166602^2 + 30163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28666032973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28666032973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28666033973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333016486 + 14333016487.

It is an arithmetic number, because the mean of its divisors is an integer number (14333016487).

Almost surely, 2^28666032973 is an apocalyptic number.

It is an amenable number.

28666032973 is a deficient number, since it is larger than the sum of its proper divisors (1).

28666032973 is an equidigital number, since it uses as much as digits as its factorization.

28666032973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 28666032973 in words is "twenty-eight billion, six hundred sixty-six million, thirty-two thousand, nine hundred seventy-three".