84666587 has 2 divisors, whose sum is σ = 84666588. Its totient is φ = 84666586.

The previous prime is 84666559. The next prime is 84666623. The reversal of 84666587 is 78566648.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84666587 - 2⁶ = 84666523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84666287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42333293 + 42333294.

It is an arithmetic number, because the mean of its divisors is an integer number (42333294).

Almost surely, 2^84666587 is an apocalyptic number.

84666587 is a deficient number, since it is larger than the sum of its proper divisors (1).

84666587 is an equidigital number, since it uses as much as digits as its factorization.

84666587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 50.

The square root of 84666587 is about 9201.4448321989. Note that the first 3 decimals coincide. The cubic root of 84666587 is about 439.1073275667.

The spelling of 84666587 in words is "eighty-four million, six hundred sixty-six thousand, five hundred eighty-seven".