667486646513 has 2 divisors, whose sum is σ = 667486646514. Its totient is φ = 667486646512.

The previous prime is 667486646479. The next prime is 667486646611. The reversal of 667486646513 is 315646684766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354539266624 + 312947379889 = 595432^2 + 559417^2 .

It is a cyclic number.

It is not a de Polignac number, because 667486646513 - 2³² = 663191679217 is a prime.

It is not a weakly prime, because it can be changed into another prime (667486642513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333743323256 + 333743323257.

It is an arithmetic number, because the mean of its divisors is an integer number (333743323257).

Almost surely, 2^667486646513 is an apocalyptic number.

It is an amenable number.

667486646513 is a deficient number, since it is larger than the sum of its proper divisors (1).

667486646513 is an equidigital number, since it uses as much as digits as its factorization.

667486646513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 62.

The spelling of 667486646513 in words is "six hundred sixty-seven billion, four hundred eighty-six million, six hundred forty-six thousand, five hundred thirteen".