659550427 has 4 divisors (see below), whose sum is σ = 660548896. Its totient is φ = 658551960.

The previous prime is 659550403. The next prime is 659550443. The reversal of 659550427 is 724055956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 659550427 - 2¹⁵ = 659517659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659556427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498243 + ... + 499564.

It is an arithmetic number, because the mean of its divisors is an integer number (165137224).

Almost surely, 2^659550427 is an apocalyptic number.

659550427 is a deficient number, since it is larger than the sum of its proper divisors (998469).

659550427 is an equidigital number, since it uses as much as digits as its factorization.

659550427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998468.

The product of its (nonzero) digits is 378000, while the sum is 43.

The square root of 659550427 is about 25681.7138641486. The cubic root of 659550427 is about 870.4610349839.

The spelling of 659550427 in words is "six hundred fifty-nine million, five hundred fifty thousand, four hundred twenty-seven".