66304108879856 has 40 divisors (see below), whose sum is σ = 135721543533120. Its totient is φ = 31327840135424.

The previous prime is 66304108879837. The next prime is 66304108879907. The reversal of 66304108879856 is 65897880140366.

It is a super-3 number, since 3×66304108879856³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66304108879856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1520156771 + ... + 1520200386.

It is an arithmetic number, because the mean of its divisors is an integer number (3393038588328).

Almost surely, 2^{66304108879856} is an apocalyptic number.

It is an amenable number.

66304108879856 is an abundant number, since it is smaller than the sum of its proper divisors (69417434653264).

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

66304108879856 is a wasteful number, since it uses less digits than its factorization.

66304108879856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040357241 (or 3040357235 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 71.

The spelling of 66304108879856 in words is "sixty-six trillion, three hundred four billion, one hundred eight million, eight hundred seventy-nine thousand, eight hundred fifty-six".