66026392493 has 2 divisors, whose sum is σ = 66026392494. Its totient is φ = 66026392492.

The previous prime is 66026392469. The next prime is 66026392507. The reversal of 66026392493 is 39429362066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43072021444 + 22954371049 = 207538^2 + 151507^2 .

It is a cyclic number.

It is not a de Polignac number, because 66026392493 - 2¹⁸ = 66026130349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66026392403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33013196246 + 33013196247.

It is an arithmetic number, because the mean of its divisors is an integer number (33013196247).

Almost surely, 2^66026392493 is an apocalyptic number.

It is an amenable number.

66026392493 is a deficient number, since it is larger than the sum of its proper divisors (1).

66026392493 is an equidigital number, since it uses as much as digits as its factorization.

66026392493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 50.

The spelling of 66026392493 in words is "sixty-six billion, twenty-six million, three hundred ninety-two thousand, four hundred ninety-three".