66687132368 has 20 divisors (see below), whose sum is σ = 136006652160. Its totient is φ = 31588641504.

The previous prime is 66687132301. The next prime is 66687132401. The reversal of 66687132368 is 86323178666.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 109682480 + ... + 109683087.

It is an arithmetic number, because the mean of its divisors is an integer number (6800332608).

Almost surely, 2^66687132368 is an apocalyptic number.

It is an amenable number.

66687132368 is an abundant number, since it is smaller than the sum of its proper divisors (69319519792).

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

66687132368 is a wasteful number, since it uses less digits than its factorization.

66687132368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219365594 (or 219365588 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 56.

The spelling of 66687132368 in words is "sixty-six billion, six hundred eighty-seven million, one hundred thirty-two thousand, three hundred sixty-eight".