66229549 has 2 divisors, whose sum is σ = 66229550. Its totient is φ = 66229548.

The previous prime is 66229543. The next prime is 66229577. The reversal of 66229549 is 94592266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41409225 + 24820324 = 6435^2 + 4982^2 .

It is a cyclic number.

It is not a de Polignac number, because 66229549 - 2¹⁹ = 65705261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66229543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33114774 + 33114775.

It is an arithmetic number, because the mean of its divisors is an integer number (33114775).

Almost surely, 2^66229549 is an apocalyptic number.

It is an amenable number.

66229549 is a deficient number, since it is larger than the sum of its proper divisors (1).

66229549 is an equidigital number, since it uses as much as digits as its factorization.

66229549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 66229549 is about 8138.1539061387. The cubic root of 66229549 is about 404.5919764076.

The spelling of 66229549 in words is "sixty-six million, two hundred twenty-nine thousand, five hundred forty-nine".