61663250808 has 32 divisors (see below), whose sum is σ = 171286808400. Its totient is φ = 20554416864.

The previous prime is 61663250791. The next prime is 61663250821. The reversal of 61663250808 is 80805236616.

61663250808 is a `hidden beast` number, since 6 + 1 + 6 + 632 + 5 + 0 + 8 + 0 + 8 = 666.

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, 142738791 + ... + 142739222.

Almost surely, 2^61663250808 is an apocalyptic number.

It is an amenable number.

61663250808 is an abundant number, since it is smaller than the sum of its proper divisors (109623557592).

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

61663250808 is a wasteful number, since it uses less digits than its factorization.

61663250808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285478028 (or 285478018 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 61663250808 in words is "sixty-one billion, six hundred sixty-three million, two hundred fifty thousand, eight hundred eight".