66673085293 has 2 divisors, whose sum is σ = 66673085294. Its totient is φ = 66673085292.

The previous prime is 66673085233. The next prime is 66673085299. The reversal of 66673085293 is 39258037666.

66673085293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57829187529 + 8843897764 = 240477^2 + 94042^2 .

It is a cyclic number.

It is not a de Polignac number, because 66673085293 - 2¹³ = 66673077101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66673085299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33336542646 + 33336542647.

It is an arithmetic number, because the mean of its divisors is an integer number (33336542647).

Almost surely, 2^66673085293 is an apocalyptic number.

It is an amenable number.

66673085293 is a deficient number, since it is larger than the sum of its proper divisors (1).

66673085293 is an equidigital number, since it uses as much as digits as its factorization.

66673085293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 66673085293 in words is "sixty-six billion, six hundred seventy-three million, eighty-five thousand, two hundred ninety-three".