65493916668 has 18 divisors (see below), whose sum is σ = 165554067224. Its totient is φ = 21831305544.

The previous prime is 65493916633. The next prime is 65493916673. The reversal of 65493916668 is 86661939456.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 909637696 + ... + 909637767.

Almost surely, 2^65493916668 is an apocalyptic number.

It is an amenable number.

65493916668 is an abundant number, since it is smaller than the sum of its proper divisors (100060150556).

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

65493916668 is a wasteful number, since it uses less digits than its factorization.

65493916668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819275473 (or 1819275468 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 63.

The spelling of 65493916668 in words is "sixty-five billion, four hundred ninety-three million, nine hundred sixteen thousand, six hundred sixty-eight".