667481108573 has 2 divisors, whose sum is σ = 667481108574. Its totient is φ = 667481108572.

The previous prime is 667481108537. The next prime is 667481108617. The reversal of 667481108573 is 375801184766.

Together with previous prime (667481108537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512853635044 + 154627473529 = 716138^2 + 393227^2 .

It is a cyclic number.

It is not a de Polignac number, because 667481108573 - 2⁶ = 667481108509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667481108513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333740554286 + 333740554287.

It is an arithmetic number, because the mean of its divisors is an integer number (333740554287).

Almost surely, 2^667481108573 is an apocalyptic number.

It is an amenable number.

667481108573 is a deficient number, since it is larger than the sum of its proper divisors (1).

667481108573 is an equidigital number, since it uses as much as digits as its factorization.

667481108573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 667481108573 in words is "six hundred sixty-seven billion, four hundred eighty-one million, one hundred eight thousand, five hundred seventy-three".