66131258208 has 48 divisors (see below), whose sum is σ = 181142148096. Its totient is φ = 21085328000.

The previous prime is 66131258189. The next prime is 66131258227. The reversal of 66131258208 is 80285213166.

It is an interprime number because it is at equal distance from previous prime (66131258189) and next prime (66131258227).

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 66131258208.

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, 14973168 + ... + 14977583.

It is an arithmetic number, because the mean of its divisors is an integer number (3773794752).

Almost surely, 2^66131258208 is an apocalyptic number.

It is an amenable number.

66131258208 is an abundant number, since it is smaller than the sum of its proper divisors (115010889888).

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

66131258208 is a wasteful number, since it uses less digits than its factorization.

66131258208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29950787 (or 29950779 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 66131258208 in words is "sixty-six billion, one hundred thirty-one million, two hundred fifty-eight thousand, two hundred eight".