663523460 has 24 divisors (see below), whose sum is σ = 1395698136. Its totient is φ = 264971520.

The previous prime is 663523429. The next prime is 663523463. The reversal of 663523460 is 64325366.

It can be written as a sum of positive squares in 4 ways, for example, as 116337796 + 547185664 = 10786^2 + 23392^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 663523460.

It is not an unprimeable number, because it can be changed into a prime (663523463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14801 + ... + 39320.

It is an arithmetic number, because the mean of its divisors is an integer number (58154089).

Almost surely, 2^663523460 is an apocalyptic number.

It is an amenable number.

663523460 is an abundant number, since it is smaller than the sum of its proper divisors (732174676).

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

663523460 is a wasteful number, since it uses less digits than its factorization.

663523460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54743 (or 54741 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 663523460 is about 25758.9491245276. The cubic root of 663523460 is about 872.2053794077.

The spelling of 663523460 in words is "six hundred sixty-three million, five hundred twenty-three thousand, four hundred sixty".