665046073 has 2 divisors, whose sum is σ = 665046074. Its totient is φ = 665046072.

The previous prime is 665046071. The next prime is 665046077. The reversal of 665046073 is 370640566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431475984 + 233570089 = 20772^2 + 15283^2 .

It is a cyclic number.

It is not a de Polignac number, because 665046073 - 2¹ = 665046071 is a prime.

Together with 665046071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (665046071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332523036 + 332523037.

It is an arithmetic number, because the mean of its divisors is an integer number (332523037).

Almost surely, 2^665046073 is an apocalyptic number.

It is an amenable number.

665046073 is a deficient number, since it is larger than the sum of its proper divisors (1).

665046073 is an equidigital number, since it uses as much as digits as its factorization.

665046073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 665046073 is about 25788.4872181367. The cubic root of 665046073 is about 872.8720308999.

The spelling of 665046073 in words is "six hundred sixty-five million, forty-six thousand, seventy-three".