659881687 has 2 divisors, whose sum is σ = 659881688. Its totient is φ = 659881686.

The previous prime is 659881679. The next prime is 659881697. The reversal of 659881687 is 786188956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 659881687 - 2³ = 659881679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659881657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329940843 + 329940844.

It is an arithmetic number, because the mean of its divisors is an integer number (329940844).

Almost surely, 2^659881687 is an apocalyptic number.

659881687 is a deficient number, since it is larger than the sum of its proper divisors (1).

659881687 is an equidigital number, since it uses as much as digits as its factorization.

659881687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 58.

The square root of 659881687 is about 25688.1623904864. The cubic root of 659881687 is about 870.6067406291.

The spelling of 659881687 in words is "six hundred fifty-nine million, eight hundred eighty-one thousand, six hundred eighty-seven".