663240609071 has 2 divisors, whose sum is σ = 663240609072. Its totient is φ = 663240609070.

The previous prime is 663240609019. The next prime is 663240609107. The reversal of 663240609071 is 170906042366.

663240609071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (663240609107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663240609071 - 2²⁶ = 663173500207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663240609001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331620304535 + 331620304536.

It is an arithmetic number, because the mean of its divisors is an integer number (331620304536).

Almost surely, 2^663240609071 is an apocalyptic number.

663240609071 is a deficient number, since it is larger than the sum of its proper divisors (1).

663240609071 is an equidigital number, since it uses as much as digits as its factorization.

663240609071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 663240609071 in words is "six hundred sixty-three billion, two hundred forty million, six hundred nine thousand, seventy-one".