63321663 has 4 divisors (see below), whose sum is σ = 84428888. Its totient is φ = 42214440.

The previous prime is 63321659. The next prime is 63321683. The reversal of 63321663 is 36612336.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 63321663 - 2² = 63321659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63321663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63321653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10553608 + ... + 10553613.

It is an arithmetic number, because the mean of its divisors is an integer number (21107222).

Almost surely, 2^63321663 is an apocalyptic number.

63321663 is a deficient number, since it is larger than the sum of its proper divisors (21107225).

63321663 is a wasteful number, since it uses less digits than its factorization.

63321663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21107224.

The product of its digits is 11664, while the sum is 30.

The square root of 63321663 is about 7957.4909990524. The cubic root of 63321663 is about 398.5817754574.

Adding to 63321663 its reverse (36612336), we get a palindrome (99933999).

The spelling of 63321663 in words is "sixty-three million, three hundred twenty-one thousand, six hundred sixty-three".