663423522 has 16 divisors (see below), whose sum is σ = 1357704480. Its totient is φ = 215998272.

The previous prime is 663423499. The next prime is 663423547. The reversal of 663423522 is 225324366.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285447 + ... + 1285962.

It is an arithmetic number, because the mean of its divisors is an integer number (84856530).

Almost surely, 2^663423522 is an apocalyptic number.

663423522 is an abundant number, since it is smaller than the sum of its proper divisors (694280958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663423522 is a wasteful number, since it uses less digits than its factorization.

663423522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571457.

The product of its digits is 51840, while the sum is 33.

The square root of 663423522 is about 25757.0091819683. The cubic root of 663423522 is about 872.1615875183.

Adding to 663423522 its reverse (225324366), we get a palindrome (888747888).

The spelling of 663423522 in words is "six hundred sixty-three million, four hundred twenty-three thousand, five hundred twenty-two".