665315041 has 2 divisors, whose sum is σ = 665315042. Its totient is φ = 665315040.

The previous prime is 665315029. The next prime is 665315107. The reversal of 665315041 is 140513566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650454016 + 14861025 = 25504^2 + 3855^2 .

It is a cyclic number.

It is not a de Polignac number, because 665315041 - 2¹¹ = 665312993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665314994 and 665315012.

It is not a weakly prime, because it can be changed into another prime (665315341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332657520 + 332657521.

It is an arithmetic number, because the mean of its divisors is an integer number (332657521).

Almost surely, 2^665315041 is an apocalyptic number.

It is an amenable number.

665315041 is a deficient number, since it is larger than the sum of its proper divisors (1).

665315041 is an equidigital number, since it uses as much as digits as its factorization.

665315041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 665315041 is about 25793.7015761600. The cubic root of 665315041 is about 872.9896884130.

The spelling of 665315041 in words is "six hundred sixty-five million, three hundred fifteen thousand, forty-one".