65987587 has 2 divisors, whose sum is σ = 65987588. Its totient is φ = 65987586.

The previous prime is 65987531. The next prime is 65987617. The reversal of 65987587 is 78578956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65987587 - 2⁷ = 65987459 is a prime.

It is not a weakly prime, because it can be changed into another prime (65987287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32993793 + 32993794.

It is an arithmetic number, because the mean of its divisors is an integer number (32993794).

Almost surely, 2^65987587 is an apocalyptic number.

65987587 is a deficient number, since it is larger than the sum of its proper divisors (1).

65987587 is an equidigital number, since it uses as much as digits as its factorization.

65987587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 55.

The square root of 65987587 is about 8123.2744013729. The cubic root of 65987587 is about 404.0986651645.

The spelling of 65987587 in words is "sixty-five million, nine hundred eighty-seven thousand, five hundred eighty-seven".