63436661 has 2 divisors, whose sum is σ = 63436662. Its totient is φ = 63436660.

The previous prime is 63436657. The next prime is 63436679. The reversal of 63436661 is 16663436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33570436 + 29866225 = 5794^2 + 5465^2 .

It is a cyclic number.

It is not a de Polignac number, because 63436661 - 2² = 63436657 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63436621) 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, 31718330 + 31718331.

It is an arithmetic number, because the mean of its divisors is an integer number (31718331).

Almost surely, 2^63436661 is an apocalyptic number.

It is an amenable number.

63436661 is a deficient number, since it is larger than the sum of its proper divisors (1).

63436661 is an equidigital number, since it uses as much as digits as its factorization.

63436661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 35.

The square root of 63436661 is about 7964.7134913944. The cubic root of 63436661 is about 398.8229166681.

The spelling of 63436661 in words is "sixty-three million, four hundred thirty-six thousand, six hundred sixty-one".