659987755 has 16 divisors (see below), whose sum is σ = 907038720. Its totient is φ = 451606752.

The previous prime is 659987749. The next prime is 659987767. The reversal of 659987755 is 557789956.

It is a cyclic number.

It is not a de Polignac number, because 659987755 - 2⁵ = 659987723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 659987693 and 659987702.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 2919 + ... + 36448.

It is an arithmetic number, because the mean of its divisors is an integer number (56689920).

Almost surely, 2^659987755 is an apocalyptic number.

659987755 is a deficient number, since it is larger than the sum of its proper divisors (247050965).

659987755 is a wasteful number, since it uses less digits than its factorization.

659987755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39858.

The product of its digits is 23814000, while the sum is 61.

The square root of 659987755 is about 25690.2268382356. The cubic root of 659987755 is about 870.6533846312.

The spelling of 659987755 in words is "six hundred fifty-nine million, nine hundred eighty-seven thousand, seven hundred fifty-five".