66710279 has 2 divisors, whose sum is σ = 66710280. Its totient is φ = 66710278.

The previous prime is 66710221. The next prime is 66710291. The reversal of 66710279 is 97201766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66710279 - 2¹² = 66706183 is a prime.

It is a super-2 number, since 2×66710279² = 8900522648515682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66710209) 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, 33355139 + 33355140.

It is an arithmetic number, because the mean of its divisors is an integer number (33355140).

Almost surely, 2^66710279 is an apocalyptic number.

66710279 is a deficient number, since it is larger than the sum of its proper divisors (1).

66710279 is an equidigital number, since it uses as much as digits as its factorization.

66710279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 66710279 is about 8167.6360717162. The cubic root of 66710279 is about 405.5685334379.

The spelling of 66710279 in words is "sixty-six million, seven hundred ten thousand, two hundred seventy-nine".