667882687647 has 8 divisors (see below), whose sum is σ = 1017726000256. Its totient is φ = 381647250072.

The previous prime is 667882687601. The next prime is 667882687673. The reversal of 667882687647 is 746786288766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667882687647 - 2¹⁰ = 667882686623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667882687247) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15901968733 + ... + 15901968774.

It is an arithmetic number, because the mean of its divisors is an integer number (127215750032).

Almost surely, 2^667882687647 is an apocalyptic number.

667882687647 is a deficient number, since it is larger than the sum of its proper divisors (349843312609).

667882687647 is a wasteful number, since it uses less digits than its factorization.

667882687647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31803937517.

The product of its digits is 1820786688, while the sum is 75.

The spelling of 667882687647 in words is "six hundred sixty-seven billion, eight hundred eighty-two million, six hundred eighty-seven thousand, six hundred forty-seven".