66744292579 has 2 divisors, whose sum is σ = 66744292580. Its totient is φ = 66744292578.

The previous prime is 66744292543. The next prime is 66744292609. The reversal of 66744292579 is 97529244766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66744292579 - 2¹⁵ = 66744259811 is a prime.

It is not a weakly prime, because it can be changed into another prime (66744293579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33372146289 + 33372146290.

It is an arithmetic number, because the mean of its divisors is an integer number (33372146290).

Almost surely, 2^66744292579 is an apocalyptic number.

66744292579 is a deficient number, since it is larger than the sum of its proper divisors (1).

66744292579 is an equidigital number, since it uses as much as digits as its factorization.

66744292579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 61.

The spelling of 66744292579 in words is "sixty-six billion, seven hundred forty-four million, two hundred ninety-two thousand, five hundred seventy-nine".