66882241 has 2 divisors, whose sum is σ = 66882242. Its totient is φ = 66882240.

The previous prime is 66882203. The next prime is 66882251. The reversal of 66882241 is 14228866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62489025 + 4393216 = 7905^2 + 2096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66882241 is a prime.

It is a super-2 number, since 2×66882241² = 8946468322364162, 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 66882241.

It is not a weakly prime, because it can be changed into another prime (66882251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33441120 + 33441121.

It is an arithmetic number, because the mean of its divisors is an integer number (33441121).

Almost surely, 2^66882241 is an apocalyptic number.

It is an amenable number.

66882241 is a deficient number, since it is larger than the sum of its proper divisors (1).

66882241 is an equidigital number, since it uses as much as digits as its factorization.

66882241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 37.

The square root of 66882241 is about 8178.1563325728. The cubic root of 66882241 is about 405.9167183397.

The spelling of 66882241 in words is "sixty-six million, eight hundred eighty-two thousand, two hundred forty-one".