61660362241 has 2 divisors, whose sum is σ = 61660362242. Its totient is φ = 61660362240.

The previous prime is 61660362209. The next prime is 61660362289. The reversal of 61660362241 is 14226306616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61196864400 + 463497841 = 247380^2 + 21529^2 .

It is a cyclic number.

It is not a de Polignac number, because 61660362241 - 2⁵ = 61660362209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61660362241.

It is not a weakly prime, because it can be changed into another prime (61660362041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30830181120 + 30830181121.

It is an arithmetic number, because the mean of its divisors is an integer number (30830181121).

Almost surely, 2^61660362241 is an apocalyptic number.

It is an amenable number.

61660362241 is a deficient number, since it is larger than the sum of its proper divisors (1).

61660362241 is an equidigital number, since it uses as much as digits as its factorization.

61660362241 is an odious number, because the sum of its binary digits is odd.

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

Adding to 61660362241 its reverse (14226306616), we get a palindrome (75886668857).

The spelling of 61660362241 in words is "sixty-one billion, six hundred sixty million, three hundred sixty-two thousand, two hundred forty-one".