66061223 has 2 divisors, whose sum is σ = 66061224. Its totient is φ = 66061222.

The previous prime is 66061211. The next prime is 66061253. The reversal of 66061223 is 32216066.

66061223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66061223 - 2⁴ = 66061207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66061192 and 66061201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66061253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33030611 + 33030612.

It is an arithmetic number, because the mean of its divisors is an integer number (33030612).

Almost surely, 2^66061223 is an apocalyptic number.

66061223 is a deficient number, since it is larger than the sum of its proper divisors (1).

66061223 is an equidigital number, since it uses as much as digits as its factorization.

66061223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 66061223 is about 8127.8055463944. The cubic root of 66061223 is about 404.2489214431.

Adding to 66061223 its reverse (32216066), we get a palindrome (98277289).

The spelling of 66061223 in words is "sixty-six million, sixty-one thousand, two hundred twenty-three".