66452279 has 2 divisors, whose sum is σ = 66452280. Its totient is φ = 66452278.

The previous prime is 66452273. The next prime is 66452297. The reversal of 66452279 is 97225466.

Together with next prime (66452297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66452279 - 2⁴ = 66452263 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66452273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33226139 + 33226140.

It is an arithmetic number, because the mean of its divisors is an integer number (33226140).

Almost surely, 2^66452279 is an apocalyptic number.

66452279 is a deficient number, since it is larger than the sum of its proper divisors (1).

66452279 is an equidigital number, since it uses as much as digits as its factorization.

66452279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 66452279 is about 8151.8267277954. The cubic root of 66452279 is about 405.0450165884.

The spelling of 66452279 in words is "sixty-six million, four hundred fifty-two thousand, two hundred seventy-nine".