667256325013 has 2 divisors, whose sum is σ = 667256325014. Its totient is φ = 667256325012.

The previous prime is 667256324957. The next prime is 667256325161. The reversal of 667256325013 is 310523652766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666864957924 + 391367089 = 816618^2 + 19783^2 .

It is a cyclic number.

It is not a de Polignac number, because 667256325013 - 2²⁹ = 666719454101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667256325613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333628162506 + 333628162507.

It is an arithmetic number, because the mean of its divisors is an integer number (333628162507).

Almost surely, 2^667256325013 is an apocalyptic number.

It is an amenable number.

667256325013 is a deficient number, since it is larger than the sum of its proper divisors (1).

667256325013 is an equidigital number, since it uses as much as digits as its factorization.

667256325013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 46.

Adding to 667256325013 its reverse (310523652766), we get a palindrome (977779977779).

The spelling of 667256325013 in words is "six hundred sixty-seven billion, two hundred fifty-six million, three hundred twenty-five thousand, thirteen".