63661404334 has 16 divisors (see below), whose sum is σ = 105204628656. Its totient is φ = 28650496000.

The previous prime is 63661404299. The next prime is 63661404349. The reversal of 63661404334 is 43340416636.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14323027 + ... + 14327470.

It is an arithmetic number, because the mean of its divisors is an integer number (6575289291).

Almost surely, 2^63661404334 is an apocalyptic number.

63661404334 is a deficient number, since it is larger than the sum of its proper divisors (41543224322).

63661404334 is a wasteful number, since it uses less digits than its factorization.

63661404334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28650611.

The product of its (nonzero) digits is 373248, while the sum is 40.

The spelling of 63661404334 in words is "sixty-three billion, six hundred sixty-one million, four hundred four thousand, three hundred thirty-four".