665056097 has 2 divisors, whose sum is σ = 665056098. Its totient is φ = 665056096.

The previous prime is 665056087. The next prime is 665056127. The reversal of 665056097 is 790650566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421727296 + 243328801 = 20536^2 + 15599^2 .

It is a cyclic number.

It is not a de Polignac number, because 665056097 - 2¹⁰ = 665055073 is a prime.

It is a super-3 number, since 3×665056097³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (665056027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332528048 + 332528049.

It is an arithmetic number, because the mean of its divisors is an integer number (332528049).

Almost surely, 2^665056097 is an apocalyptic number.

It is an amenable number.

665056097 is a deficient number, since it is larger than the sum of its proper divisors (1).

665056097 is an equidigital number, since it uses as much as digits as its factorization.

665056097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 665056097 is about 25788.6815676955. The cubic root of 665056097 is about 872.8764163731.

The spelling of 665056097 in words is "six hundred sixty-five million, fifty-six thousand, ninety-seven".