66432241 has 2 divisors, whose sum is σ = 66432242. Its totient is φ = 66432240.

The previous prime is 66432229. The next prime is 66432251. The reversal of 66432241 is 14223466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66178225 + 254016 = 8135^2 + 504^2 .

It is a cyclic number.

It is not a de Polignac number, because 66432241 - 2¹¹ = 66430193 is a prime.

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, 33216120 + 33216121.

It is an arithmetic number, because the mean of its divisors is an integer number (33216121).

Almost surely, 2^66432241 is an apocalyptic number.

It is an amenable number.

66432241 is a deficient number, since it is larger than the sum of its proper divisors (1).

66432241 is an equidigital number, since it uses as much as digits as its factorization.

66432241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 28.

The square root of 66432241 is about 8150.5975854535. The cubic root of 66432241 is about 405.0043001118.

The spelling of 66432241 in words is "sixty-six million, four hundred thirty-two thousand, two hundred forty-one".