65884516840 has 32 divisors (see below), whose sum is σ = 148764005280. Its totient is φ = 26260679232.

The previous prime is 65884516813. The next prime is 65884516843. The reversal of 65884516840 is 4861548856.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (65884516843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2898774 + ... + 2921413.

It is an arithmetic number, because the mean of its divisors is an integer number (4648875165).

Almost surely, 2^65884516840 is an apocalyptic number.

It is an amenable number.

65884516840 is an abundant number, since it is smaller than the sum of its proper divisors (82879488440).

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

65884516840 is a wasteful number, since it uses less digits than its factorization.

65884516840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5820481 (or 5820477 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 55.

The spelling of 65884516840 in words is "sixty-five billion, eight hundred eighty-four million, five hundred sixteen thousand, eight hundred forty".