66281229 has 12 divisors (see below), whose sum is σ = 109416736. Its totient is φ = 37874952.

The previous prime is 66281203. The next prime is 66281251. The reversal of 66281229 is 92218266.

It is a happy number.

66281229 is a `hidden beast` number, since 6 + 628 + 1 + 2 + 29 = 666.

It is not a de Polignac number, because 66281229 - 2⁹ = 66280717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66281193 and 66281202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66281279) 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 in 11 ways as a sum of consecutive naturals, for example, 525979 + ... + 526104.

Almost surely, 2^66281229 is an apocalyptic number.

It is an amenable number.

66281229 is a deficient number, since it is larger than the sum of its proper divisors (43135507).

66281229 is a wasteful number, since it uses less digits than its factorization.

66281229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052096 (or 1052093 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 66281229 is about 8141.3284542512. The cubic root of 66281229 is about 404.6971856251.

The spelling of 66281229 in words is "sixty-six million, two hundred eighty-one thousand, two hundred twenty-nine".