666340031060041 has 4 divisors (see below), whose sum is σ = 717596956526212. Its totient is φ = 615083105593872.

The previous prime is 666340031060023. The next prime is 666340031060057. The reversal of 666340031060041 is 140060130043666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 369639268260025 + 296700762800016 = 19226005^2 + 17225004^2 .

It is a cyclic number.

It is not a de Polignac number, because 666340031060041 - 2⁹ = 666340031059529 is a prime.

It is a super-2 number, since 2×666340031060041² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666340031059976 and 666340031060003.

It is not an unprimeable number, because it can be changed into a prime (666340031060021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25628462733066 + ... + 25628462733091.

It is an arithmetic number, because the mean of its divisors is an integer number (179399239131553).

Almost surely, 2^{666340031060041} is an apocalyptic number.

It is an amenable number.

666340031060041 is a deficient number, since it is larger than the sum of its proper divisors (51256925466171).

666340031060041 is a wasteful number, since it uses less digits than its factorization.

666340031060041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51256925466170.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 666340031060041 in words is "six hundred sixty-six trillion, three hundred forty billion, thirty-one million, sixty thousand, forty-one".