28223066657 has 2 divisors, whose sum is σ = 28223066658. Its totient is φ = 28223066656.

The previous prime is 28223066629. The next prime is 28223066689. The reversal of 28223066657 is 75666032282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25990598656 + 2232468001 = 161216^2 + 47249^2 .

It is a cyclic number.

It is not a de Polignac number, because 28223066657 - 2¹² = 28223062561 is a prime.

It is not a weakly prime, because it can be changed into another prime (28223066357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14111533328 + 14111533329.

It is an arithmetic number, because the mean of its divisors is an integer number (14111533329).

Almost surely, 2^28223066657 is an apocalyptic number.

It is an amenable number.

28223066657 is a deficient number, since it is larger than the sum of its proper divisors (1).

28223066657 is an equidigital number, since it uses as much as digits as its factorization.

28223066657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 28223066657 in words is "twenty-eight billion, two hundred twenty-three million, sixty-six thousand, six hundred fifty-seven".