660464087 has 2 divisors, whose sum is σ = 660464088. Its totient is φ = 660464086.

The previous prime is 660464041. The next prime is 660464099. The reversal of 660464087 is 780464066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660464087 - 2²⁰ = 659415511 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660464017) 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, 330232043 + 330232044.

It is an arithmetic number, because the mean of its divisors is an integer number (330232044).

Almost surely, 2^660464087 is an apocalyptic number.

660464087 is a deficient number, since it is larger than the sum of its proper divisors (1).

660464087 is an equidigital number, since it uses as much as digits as its factorization.

660464087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 660464087 is about 25699.4958510863. The cubic root of 660464087 is about 870.8627927266.

The spelling of 660464087 in words is "six hundred sixty million, four hundred sixty-four thousand, eighty-seven".