663654024 has 144 divisors (see below), whose sum is σ = 2092332060. Its totient is φ = 189235200.

The previous prime is 663653999. The next prime is 663654031. The reversal of 663654024 is 420456366.

663654024 is a `hidden beast` number, since 66 + 36 + 540 + 24 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 606045924 + 57608100 = 24618^2 + 7590^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 663654024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 145864 + ... + 150344.

Almost surely, 2^663654024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663654024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046166030).

663654024 is an abundant number, since it is smaller than the sum of its proper divisors (1428678036).

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

663654024 is a wasteful number, since it uses less digits than its factorization.

663654024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532 (or 4514 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 663654024 is about 25761.4833423854. The cubic root of 663654024 is about 872.2625846970.

The spelling of 663654024 in words is "six hundred sixty-three million, six hundred fifty-four thousand, twenty-four".