406666087 has 2 divisors, whose sum is σ = 406666088. Its totient is φ = 406666086.

The previous prime is 406666069. The next prime is 406666109. The reversal of 406666087 is 780666604.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406666087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406666037) 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, 203333043 + 203333044.

It is an arithmetic number, because the mean of its divisors is an integer number (203333044).

Almost surely, 2^406666087 is an apocalyptic number.

406666087 is a deficient number, since it is larger than the sum of its proper divisors (1).

406666087 is an equidigital number, since it uses as much as digits as its factorization.

406666087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 406666087 is about 20165.9635772754. The cubic root of 406666087 is about 740.8767833595.

The spelling of 406666087 in words is "four hundred six million, six hundred sixty-six thousand, eighty-seven".