61060566617 has 2 divisors, whose sum is σ = 61060566618. Its totient is φ = 61060566616.

The previous prime is 61060566583. The next prime is 61060566653. The reversal of 61060566617 is 71666506016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57406243216 + 3654323401 = 239596^2 + 60451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61060566617 is a prime.

It is a super-3 number, since 3×61060566617³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (61060568617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30530283308 + 30530283309.

It is an arithmetic number, because the mean of its divisors is an integer number (30530283309).

Almost surely, 2^61060566617 is an apocalyptic number.

It is an amenable number.

61060566617 is a deficient number, since it is larger than the sum of its proper divisors (1).

61060566617 is an equidigital number, since it uses as much as digits as its factorization.

61060566617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 61060566617 in words is "sixty-one billion, sixty million, five hundred sixty-six thousand, six hundred seventeen".