63106661 has 2 divisors, whose sum is σ = 63106662. Its totient is φ = 63106660.

The previous prime is 63106649. The next prime is 63106691. The reversal of 63106661 is 16660136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47748100 + 15358561 = 6910^2 + 3919^2 .

It is a cyclic number.

It is not a de Polignac number, because 63106661 - 2⁶ = 63106597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63106691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31553330 + 31553331.

It is an arithmetic number, because the mean of its divisors is an integer number (31553331).

Almost surely, 2^63106661 is an apocalyptic number.

It is an amenable number.

63106661 is a deficient number, since it is larger than the sum of its proper divisors (1).

63106661 is an equidigital number, since it uses as much as digits as its factorization.

63106661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 63106661 is about 7943.9701031663. The cubic root of 63106661 is about 398.1301498545.

Adding to 63106661 its reverse (16660136), we get a palindrome (79766797).

The spelling of 63106661 in words is "sixty-three million, one hundred six thousand, six hundred sixty-one".