663540234 has 16 divisors (see below), whose sum is σ = 1516663488. Its totient is φ = 189582912.

The previous prime is 663540233. The next prime is 663540253. The reversal of 663540234 is 432045366.

It is a junction number, because it is equal to n+sod(n) for n = 663540195 and 663540204.

It is not an unprimeable number, because it can be changed into a prime (663540233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7899247 + ... + 7899330.

It is an arithmetic number, because the mean of its divisors is an integer number (94791468).

Almost surely, 2^663540234 is an apocalyptic number.

663540234 is an abundant number, since it is smaller than the sum of its proper divisors (853123254).

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

663540234 is a wasteful number, since it uses less digits than its factorization.

663540234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15798589.

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

The square root of 663540234 is about 25759.2747180506. The cubic root of 663540234 is about 872.2127291854.

The spelling of 663540234 in words is "six hundred sixty-three million, five hundred forty thousand, two hundred thirty-four".