666245317241 has 12 divisors (see below), whose sum is σ = 787725313380. Its totient is φ = 561705651360.

The previous prime is 666245317229. The next prime is 666245317259. The reversal of 666245317241 is 142713542666.

666245317241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16359433216 + 649885884025 = 127904^2 + 806155^2 .

It is a de Polignac number, because none of the positive numbers 2^k-666245317241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666245317201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111446546 + ... + 111452523.

It is an arithmetic number, because the mean of its divisors is an integer number (65643776115).

Almost surely, 2^666245317241 is an apocalyptic number.

666245317241 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

666245317241 is a deficient number, since it is larger than the sum of its proper divisors (121479996139).

666245317241 is a wasteful number, since it uses less digits than its factorization.

666245317241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222899144 (or 222899137 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The spelling of 666245317241 in words is "six hundred sixty-six billion, two hundred forty-five million, three hundred seventeen thousand, two hundred forty-one".