66280079 has 2 divisors, whose sum is σ = 66280080. Its totient is φ = 66280078.

The previous prime is 66280021. The next prime is 66280111. The reversal of 66280079 is 97008266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66280079 - 2¹² = 66275983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66280679) 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, 33140039 + 33140040.

It is an arithmetic number, because the mean of its divisors is an integer number (33140040).

Almost surely, 2^66280079 is an apocalyptic number.

66280079 is a deficient number, since it is larger than the sum of its proper divisors (1).

66280079 is an equidigital number, since it uses as much as digits as its factorization.

66280079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 66280079 is about 8141.2578266506. The cubic root of 66280079 is about 404.6948450707.

The spelling of 66280079 in words is "sixty-six million, two hundred eighty thousand, seventy-nine".