63965663 has 2 divisors, whose sum is σ = 63965664. Its totient is φ = 63965662.

The previous prime is 63965659. The next prime is 63965683. The reversal of 63965663 is 36656936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63965663 - 2² = 63965659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63965653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31982831 + 31982832.

It is an arithmetic number, because the mean of its divisors is an integer number (31982832).

Almost surely, 2^63965663 is an apocalyptic number.

63965663 is a deficient number, since it is larger than the sum of its proper divisors (1).

63965663 is an equidigital number, since it uses as much as digits as its factorization.

63965663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 44.

The square root of 63965663 is about 7997.8536495737. The cubic root of 63965663 is about 399.9284517862.

The spelling of 63965663 in words is "sixty-three million, nine hundred sixty-five thousand, six hundred sixty-three".