66256241 has 2 divisors, whose sum is σ = 66256242. Its totient is φ = 66256240.

The previous prime is 66256193. The next prime is 66256279. The reversal of 66256241 is 14265266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62473216 + 3783025 = 7904^2 + 1945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66256241 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66256198 and 66256207.

It is not a weakly prime, because it can be changed into another prime (66256741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33128120 + 33128121.

It is an arithmetic number, because the mean of its divisors is an integer number (33128121).

Almost surely, 2^66256241 is an apocalyptic number.

It is an amenable number.

66256241 is a deficient number, since it is larger than the sum of its proper divisors (1).

66256241 is an equidigital number, since it uses as much as digits as its factorization.

66256241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 66256241 is about 8139.7936706037. The cubic root of 66256241 is about 404.6463223339.

The spelling of 66256241 in words is "sixty-six million, two hundred fifty-six thousand, two hundred forty-one".