63660663 has 24 divisors (see below), whose sum is σ = 100573200. Its totient is φ = 38482560.

The previous prime is 63660661. The next prime is 63660677. The reversal of 63660663 is 36606636.

It is not a de Polignac number, because 63660663 - 2¹ = 63660661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63660661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60163 + ... + 61211.

It is an arithmetic number, because the mean of its divisors is an integer number (4190550).

Almost surely, 2^63660663 is an apocalyptic number.

63660663 is a deficient number, since it is larger than the sum of its proper divisors (36912537).

63660663 is a wasteful number, since it uses less digits than its factorization.

63660663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679 (or 1676 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The square root of 63660663 is about 7978.7632500282. The cubic root of 63660663 is about 399.2917947701.

The spelling of 63660663 in words is "sixty-three million, six hundred sixty thousand, six hundred sixty-three".