66432229 has 2 divisors, whose sum is σ = 66432230. Its totient is φ = 66432228.

The previous prime is 66432221. The next prime is 66432241. The reversal of 66432229 is 92223466.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66341025 + 91204 = 8145^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 66432229 - 2³ = 66432221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66432194 and 66432203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66432221) 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 as a sum of consecutive naturals, namely, 33216114 + 33216115.

It is an arithmetic number, because the mean of its divisors is an integer number (33216115).

Almost surely, 2^66432229 is an apocalyptic number.

It is an amenable number.

66432229 is a deficient number, since it is larger than the sum of its proper divisors (1).

66432229 is an equidigital number, since it uses as much as digits as its factorization.

66432229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 66432229 is about 8150.5968493111. The cubic root of 66432229 is about 405.0042757258.

The spelling of 66432229 in words is "sixty-six million, four hundred thirty-two thousand, two hundred twenty-nine".