66436313 has 2 divisors, whose sum is σ = 66436314. Its totient is φ = 66436312.

The previous prime is 66436297. The next prime is 66436373. The reversal of 66436313 is 31363466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56145049 + 10291264 = 7493^2 + 3208^2 .

It is a cyclic number.

It is not a de Polignac number, because 66436313 - 2⁴ = 66436297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66436313.

It is not a weakly prime, because it can be changed into another prime (66436373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33218156 + 33218157.

It is an arithmetic number, because the mean of its divisors is an integer number (33218157).

Almost surely, 2^66436313 is an apocalyptic number.

It is an amenable number.

66436313 is a deficient number, since it is larger than the sum of its proper divisors (1).

66436313 is an equidigital number, since it uses as much as digits as its factorization.

66436313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 32.

The square root of 66436313 is about 8150.8473792606. The cubic root of 66436313 is about 405.0125749284.

Adding to 66436313 its reverse (31363466), we get a palindrome (97799779).

The spelling of 66436313 in words is "sixty-six million, four hundred thirty-six thousand, three hundred thirteen".