66318318628884 has 96 divisors (see below), whose sum is σ = 197342064541440. Its totient is φ = 18866768707584.

The previous prime is 66318318628823. The next prime is 66318318628897. The reversal of 66318318628884 is 48882681381366.

66318318628884 is a `hidden beast` number, since 66 + 31 + 8 + 3 + 186 + 288 + 84 = 666.

66318318628884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×66318318628884³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188069869 + ... + 188422164.

It is an arithmetic number, because the mean of its divisors is an integer number (2055646505640).

Almost surely, 2^{66318318628884} is an apocalyptic number.

It is an amenable number.

66318318628884 is an abundant number, since it is smaller than the sum of its proper divisors (131023745912556).

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

66318318628884 is a wasteful number, since it uses less digits than its factorization.

66318318628884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376492286 (or 376492278 counting only the distinct ones).

The product of its digits is 509607936, while the sum is 72.

The spelling of 66318318628884 in words is "sixty-six trillion, three hundred eighteen billion, three hundred eighteen million, six hundred twenty-eight thousand, eight hundred eighty-four".