66671229 has 16 divisors (see below), whose sum is σ = 94333248. Its totient is φ = 41740032.

The previous prime is 66671177. The next prime is 66671233. The reversal of 66671229 is 92217666.

It is not a de Polignac number, because 66671229 - 2⁹ = 66670717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66671249) 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 15 ways as a sum of consecutive naturals, for example, 27234 + ... + 29580.

It is an arithmetic number, because the mean of its divisors is an integer number (5895828).

Almost surely, 2^66671229 is an apocalyptic number.

It is an amenable number.

66671229 is a deficient number, since it is larger than the sum of its proper divisors (27662019).

66671229 is a wasteful number, since it uses less digits than its factorization.

66671229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924.

The product of its digits is 54432, while the sum is 39.

The square root of 66671229 is about 8165.2451892151. The cubic root of 66671229 is about 405.4893825049.

The spelling of 66671229 in words is "sixty-six million, six hundred seventy-one thousand, two hundred twenty-nine".