665829011 has 2 divisors, whose sum is σ = 665829012. Its totient is φ = 665829010.

The previous prime is 665828981. The next prime is 665829029. The reversal of 665829011 is 110928566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665829011 - 2²⁶ = 598720147 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (665829041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332914505 + 332914506.

It is an arithmetic number, because the mean of its divisors is an integer number (332914506).

Almost surely, 2^665829011 is an apocalyptic number.

665829011 is a deficient number, since it is larger than the sum of its proper divisors (1).

665829011 is an equidigital number, since it uses as much as digits as its factorization.

665829011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 665829011 is about 25803.6627438819. The cubic root of 665829011 is about 873.2144315753.

The spelling of 665829011 in words is "six hundred sixty-five million, eight hundred twenty-nine thousand, eleven".