665063611 has 2 divisors, whose sum is σ = 665063612. Its totient is φ = 665063610.

The previous prime is 665063587. The next prime is 665063621. The reversal of 665063611 is 116360566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665063611 - 2¹⁷ = 664932539 is a prime.

It is not a weakly prime, because it can be changed into another prime (665063621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332531805 + 332531806.

It is an arithmetic number, because the mean of its divisors is an integer number (332531806).

Almost surely, 2^665063611 is an apocalyptic number.

665063611 is a deficient number, since it is larger than the sum of its proper divisors (1).

665063611 is an equidigital number, since it uses as much as digits as its factorization.

665063611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 665063611 is about 25788.8272513505. The cubic root of 665063611 is about 872.8797036992.

The spelling of 665063611 in words is "six hundred sixty-five million, sixty-three thousand, six hundred eleven".