66386233 has 2 divisors, whose sum is σ = 66386234. Its totient is φ = 66386232.

The previous prime is 66386219. The next prime is 66386279. The reversal of 66386233 is 33268366.

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., 35617024 + 30769209 = 5968^2 + 5547^2 .

It is a cyclic number.

It is not a de Polignac number, because 66386233 - 2⁹ = 66385721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66386192 and 66386201.

It is not a weakly prime, because it can be changed into another prime (66386293) 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, 33193116 + 33193117.

It is an arithmetic number, because the mean of its divisors is an integer number (33193117).

Almost surely, 2^66386233 is an apocalyptic number.

It is an amenable number.

66386233 is a deficient number, since it is larger than the sum of its proper divisors (1).

66386233 is an equidigital number, since it uses as much as digits as its factorization.

66386233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 37.

The square root of 66386233 is about 8147.7747268810. The cubic root of 66386233 is about 404.9107825628.

The spelling of 66386233 in words is "sixty-six million, three hundred eighty-six thousand, two hundred thirty-three".