665382611 has 2 divisors, whose sum is σ = 665382612. Its totient is φ = 665382610.

The previous prime is 665382551. The next prime is 665382643. The reversal of 665382611 is 116283566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665382611 - 2⁶ = 665382547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (665382661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332691305 + 332691306.

It is an arithmetic number, because the mean of its divisors is an integer number (332691306).

Almost surely, 2^665382611 is an apocalyptic number.

665382611 is a deficient number, since it is larger than the sum of its proper divisors (1).

665382611 is an equidigital number, since it uses as much as digits as its factorization.

665382611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 665382611 is about 25795.0113587880. The cubic root of 665382611 is about 873.0192412878.

The spelling of 665382611 in words is "six hundred sixty-five million, three hundred eighty-two thousand, six hundred eleven".