65688227808 has 96 divisors (see below), whose sum is σ = 197104803840. Its totient is φ = 18764244480.

The previous prime is 65688227791. The next prime is 65688227809. The reversal of 65688227808 is 80872288656.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65688227809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5928898 + ... + 5939966.

It is an arithmetic number, because the mean of its divisors is an integer number (2053175040).

Almost surely, 2^65688227808 is an apocalyptic number.

It is an amenable number.

65688227808 is an abundant number, since it is smaller than the sum of its proper divisors (131416576032).

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

65688227808 is a wasteful number, since it uses less digits than its factorization.

65688227808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19920 (or 19912 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 60.

The spelling of 65688227808 in words is "sixty-five billion, six hundred eighty-eight million, two hundred twenty-seven thousand, eight hundred eight".