66226313 has 2 divisors, whose sum is σ = 66226314. Its totient is φ = 66226312.

The previous prime is 66226301. The next prime is 66226319. The reversal of 66226313 is 31362266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35844169 + 30382144 = 5987^2 + 5512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66226313 is a prime.

It is not a weakly prime, because it can be changed into another prime (66226319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113156 + 33113157.

It is an arithmetic number, because the mean of its divisors is an integer number (33113157).

Almost surely, 2^66226313 is an apocalyptic number.

It is an amenable number.

66226313 is a deficient number, since it is larger than the sum of its proper divisors (1).

66226313 is an equidigital number, since it uses as much as digits as its factorization.

66226313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 66226313 is about 8137.9550871211. The cubic root of 66226313 is about 404.5853867963.

Adding to 66226313 its reverse (31362266), we get a palindrome (97588579).

The spelling of 66226313 in words is "sixty-six million, two hundred twenty-six thousand, three hundred thirteen".