665056087 has 2 divisors, whose sum is σ = 665056088. Its totient is φ = 665056086.

The previous prime is 665056027. The next prime is 665056097. The reversal of 665056087 is 780650566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665056087 - 2¹⁵ = 665023319 is a prime.

It is a congruent number.

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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332528043 + 332528044.

It is an arithmetic number, because the mean of its divisors is an integer number (332528044).

Almost surely, 2^665056087 is an apocalyptic number.

665056087 is a deficient number, since it is larger than the sum of its proper divisors (1).

665056087 is an equidigital number, since it uses as much as digits as its factorization.

665056087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 665056087 is about 25788.6813738120. The cubic root of 665056087 is about 872.8764119982.

The spelling of 665056087 in words is "six hundred sixty-five million, fifty-six thousand, eighty-seven".