65567688828 has 12 divisors (see below), whose sum is σ = 152991273960. Its totient is φ = 21855896272.

The previous prime is 65567688827. The next prime is 65567688871. The reversal of 65567688828 is 82888676556.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65567688827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2731987023 + ... + 2731987046.

It is an arithmetic number, because the mean of its divisors is an integer number (12749272830).

Almost surely, 2^65567688828 is an apocalyptic number.

It is an amenable number.

65567688828 is an abundant number, since it is smaller than the sum of its proper divisors (87423585132).

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

65567688828 is a wasteful number, since it uses less digits than its factorization.

65567688828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463974076 (or 5463974074 counting only the distinct ones).

The product of its digits is 309657600, while the sum is 69.

The spelling of 65567688828 in words is "sixty-five billion, five hundred sixty-seven million, six hundred eighty-eight thousand, eight hundred twenty-eight".