421330663 has 8 divisors (see below), whose sum is σ = 454053600. Its totient is φ = 388652448.

The previous prime is 421330661. The next prime is 421330687. The reversal of 421330663 is 366033124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421330663 - 2¹ = 421330661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421330661) 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 in 7 ways as a sum of consecutive naturals, for example, 9873 + ... + 30661.

It is an arithmetic number, because the mean of its divisors is an integer number (56756700).

Almost surely, 2^421330663 is an apocalyptic number.

421330663 is a deficient number, since it is larger than the sum of its proper divisors (32722937).

421330663 is a wasteful number, since it uses less digits than its factorization.

421330663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22361.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 421330663 is about 20526.3407113884. The cubic root of 421330663 is about 749.6772910911.

Adding to 421330663 its reverse (366033124), we get a palindrome (787363787).

The spelling of 421330663 in words is "four hundred twenty-one million, three hundred thirty thousand, six hundred sixty-three".