65880208856 has 64 divisors (see below), whose sum is σ = 155278632960. Its totient is φ = 25667584800.

The previous prime is 65880208819. The next prime is 65880208871.

65880208856 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (56).

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 15 ways as a sum of consecutive naturals, for example, 367400 + ... + 516471.

It is an arithmetic number, because the mean of its divisors is an integer number (2426228640).

Almost surely, 2^65880208856 is an apocalyptic number.

It is an amenable number.

65880208856 is an abundant number, since it is smaller than the sum of its proper divisors (89398424104).

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

65880208856 is a wasteful number, since it uses less digits than its factorization.

65880208856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883917 (or 883891 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 56.

The spelling of 65880208856 in words is "sixty-five billion, eight hundred eighty million, two hundred eight thousand, eight hundred fifty-six".