63660613109 has 2 divisors, whose sum is σ = 63660613110. Its totient is φ = 63660613108.

The previous prime is 63660613103. The next prime is 63660613123. The reversal of 63660613109 is 90131606636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46549357009 + 17111256100 = 215753^2 + 130810^2 .

It is a cyclic number.

It is not a de Polignac number, because 63660613109 - 2⁸ = 63660612853 is a prime.

It is a super-2 number, since 2×63660613109² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63660613103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31830306554 + 31830306555.

It is an arithmetic number, because the mean of its divisors is an integer number (31830306555).

Almost surely, 2^63660613109 is an apocalyptic number.

It is an amenable number.

63660613109 is a deficient number, since it is larger than the sum of its proper divisors (1).

63660613109 is an equidigital number, since it uses as much as digits as its factorization.

63660613109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The spelling of 63660613109 in words is "sixty-three billion, six hundred sixty million, six hundred thirteen thousand, one hundred nine".