9963766061 has 2 divisors, whose sum is σ = 9963766062. Its totient is φ = 9963766060.

The previous prime is 9963766009. The next prime is 9963766091. The reversal of 9963766061 is 1606673699.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5257120036 + 4706646025 = 72506^2 + 68605^2 .

It is an emirp because it is prime and its reverse (1606673699) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9963766061 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9963765994 and 9963766012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9963766091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4981883030 + 4981883031.

It is an arithmetic number, because the mean of its divisors is an integer number (4981883031).

Almost surely, 2^9963766061 is an apocalyptic number.

It is an amenable number.

9963766061 is a deficient number, since it is larger than the sum of its proper divisors (1).

9963766061 is an equidigital number, since it uses as much as digits as its factorization.

9963766061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The square root of 9963766061 is about 99818.6658947113. The cubic root of 9963766061 is about 2151.8294190146.

The spelling of 9963766061 in words is "nine billion, nine hundred sixty-three million, seven hundred sixty-six thousand, sixty-one".