663524424 has 48 divisors (see below), whose sum is σ = 1875182400. Its totient is φ = 211557984.

The previous prime is 663524413. The next prime is 663524453. The reversal of 663524424 is 424425366.

It is a super-2 number, since 2×663524424² = 880529322489063552, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198684 + ... + 201995.

It is an arithmetic number, because the mean of its divisors is an integer number (39066300).

Almost surely, 2^663524424 is an apocalyptic number.

It is an amenable number.

663524424 is an abundant number, since it is smaller than the sum of its proper divisors (1211657976).

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

663524424 is a wasteful number, since it uses less digits than its factorization.

663524424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400714 (or 400707 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 663524424 is about 25758.9678364643. The cubic root of 663524424 is about 872.2058018020.

The spelling of 663524424 in words is "six hundred sixty-three million, five hundred twenty-four thousand, four hundred twenty-four".