66336481 has 2 divisors, whose sum is σ = 66336482. Its totient is φ = 66336480.

The previous prime is 66336433. The next prime is 66336493. The reversal of 66336481 is 18463366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43678881 + 22657600 = 6609^2 + 4760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66336481 is a prime.

It is a super-2 number, since 2×66336481² = 8801057422926722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66336481.

It is not a weakly prime, because it can be changed into another prime (66336421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33168240 + 33168241.

It is an arithmetic number, because the mean of its divisors is an integer number (33168241).

Almost surely, 2^66336481 is an apocalyptic number.

It is an amenable number.

66336481 is a deficient number, since it is larger than the sum of its proper divisors (1).

66336481 is an equidigital number, since it uses as much as digits as its factorization.

66336481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 66336481 is about 8144.7210510858. The cubic root of 66336481 is about 404.8096061848.

The spelling of 66336481 in words is "sixty-six million, three hundred thirty-six thousand, four hundred eighty-one".