667882687601 has 2 divisors, whose sum is σ = 667882687602. Its totient is φ = 667882687600.

The previous prime is 667882687597. The next prime is 667882687673. The reversal of 667882687601 is 106786288766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635049610000 + 32833077601 = 796900^2 + 181199^2 .

It is a cyclic number.

It is not a de Polignac number, because 667882687601 - 2² = 667882687597 is a prime.

It is not a weakly prime, because it can be changed into another prime (667882687301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333941343800 + 333941343801.

It is an arithmetic number, because the mean of its divisors is an integer number (333941343801).

Almost surely, 2^667882687601 is an apocalyptic number.

It is an amenable number.

667882687601 is a deficient number, since it is larger than the sum of its proper divisors (1).

667882687601 is an equidigital number, since it uses as much as digits as its factorization.

667882687601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65028096, while the sum is 65.

The spelling of 667882687601 in words is "six hundred sixty-seven billion, eight hundred eighty-two million, six hundred eighty-seven thousand, six hundred one".