66229 has 4 divisors (see below), whose sum is σ = 66976. Its totient is φ = 65484.

The previous prime is 66221. The next prime is 66239. The reversal of 66229 is 92266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92266 = 2 ⋅46133.

It is a cyclic number.

It is not a de Polignac number, because 66229 - 2³ = 66221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219 + ... + 424.

It is an arithmetic number, because the mean of its divisors is an integer number (16744).

2⁶⁶²²⁹ is an apocalyptic number.

It is an amenable number.

66229 is a deficient number, since it is larger than the sum of its proper divisors (747).

66229 is a wasteful number, since it uses less digits than its factorization.

66229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746.

The product of its digits is 1296, while the sum is 25.

The square root of 66229 is about 257.3499562852. The cubic root of 66229 is about 40.4590858470.

The spelling of 66229 in words is "sixty-six thousand, two hundred twenty-nine".