28666670333393 has 2 divisors, whose sum is σ = 28666670333394. Its totient is φ = 28666670333392.

The previous prime is 28666670333317. The next prime is 28666670333429. The reversal of 28666670333393 is 39333307666682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28157583802384 + 509086531009 = 5306372^2 + 713503^2 .

It is a cyclic number.

It is not a de Polignac number, because 28666670333393 - 2¹⁰ = 28666670332369 is a prime.

It is not a weakly prime, because it can be changed into another prime (28666670323393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333335166696 + 14333335166697.

It is an arithmetic number, because the mean of its divisors is an integer number (14333335166697).

Almost surely, 2^{28666670333393} is an apocalyptic number.

It is an amenable number.

28666670333393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28666670333393 is an equidigital number, since it uses as much as digits as its factorization.

28666670333393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317447424, while the sum is 65.

The spelling of 28666670333393 in words is "twenty-eight trillion, six hundred sixty-six billion, six hundred seventy million, three hundred thirty-three thousand, three hundred ninety-three".