663693530 has 8 divisors (see below), whose sum is σ = 1194648372. Its totient is φ = 265477408.

The previous prime is 663693521. The next prime is 663693551. The reversal of 663693530 is 35396366.

It can be written as a sum of positive squares in 2 ways, for example, as 656333161 + 7360369 = 25619^2 + 2713^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33184667 + ... + 33184686.

Almost surely, 2^663693530 is an apocalyptic number.

663693530 is a deficient number, since it is larger than the sum of its proper divisors (530954842).

663693530 is a wasteful number, since it uses less digits than its factorization.

663693530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66369360.

The product of its (nonzero) digits is 262440, while the sum is 41.

The square root of 663693530 is about 25762.2500958282. The cubic root of 663693530 is about 872.2798923707.

The spelling of 663693530 in words is "six hundred sixty-three million, six hundred ninety-three thousand, five hundred thirty".