667441408607 has 2 divisors, whose sum is σ = 667441408608. Its totient is φ = 667441408606.

The previous prime is 667441408471. The next prime is 667441408633. The reversal of 667441408607 is 706804144766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667441408607 - 2¹⁰ = 667441407583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667441404607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333720704303 + 333720704304.

It is an arithmetic number, because the mean of its divisors is an integer number (333720704304).

Almost surely, 2^667441408607 is an apocalyptic number.

667441408607 is a deficient number, since it is larger than the sum of its proper divisors (1).

667441408607 is an equidigital number, since it uses as much as digits as its factorization.

667441408607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 667441408607 in words is "six hundred sixty-seven billion, four hundred forty-one million, four hundred eight thousand, six hundred seven".