666536341 has 2 divisors, whose sum is σ = 666536342. Its totient is φ = 666536340.

The previous prime is 666536327. The next prime is 666536347. The reversal of 666536341 is 143635666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544522225 + 122014116 = 23335^2 + 11046^2 .

It is a cyclic number.

It is not a de Polignac number, because 666536341 - 2⁹ = 666535829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666536294 and 666536303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666536347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333268170 + 333268171.

It is an arithmetic number, because the mean of its divisors is an integer number (333268171).

Almost surely, 2^666536341 is an apocalyptic number.

It is an amenable number.

666536341 is a deficient number, since it is larger than the sum of its proper divisors (1).

666536341 is an equidigital number, since it uses as much as digits as its factorization.

666536341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 40.

The square root of 666536341 is about 25817.3651056803. The cubic root of 666536341 is about 873.5235360483.

The spelling of 666536341 in words is "six hundred sixty-six million, five hundred thirty-six thousand, three hundred forty-one".