66285587 has 2 divisors, whose sum is σ = 66285588. Its totient is φ = 66285586.

The previous prime is 66285581. The next prime is 66285599. The reversal of 66285587 is 78558266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66285587 - 2¹⁰ = 66284563 is a prime.

It is not a weakly prime, because it can be changed into another prime (66285581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33142793 + 33142794.

It is an arithmetic number, because the mean of its divisors is an integer number (33142794).

Almost surely, 2^66285587 is an apocalyptic number.

66285587 is a deficient number, since it is larger than the sum of its proper divisors (1).

66285587 is an equidigital number, since it uses as much as digits as its factorization.

66285587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 47.

The square root of 66285587 is about 8141.5960965894. The cubic root of 66285587 is about 404.7060550627.

The spelling of 66285587 in words is "sixty-six million, two hundred eighty-five thousand, five hundred eighty-seven".