659471561 has 8 divisors (see below), whose sum is σ = 764006784. Its totient is φ = 557517600.

The previous prime is 659471489. The next prime is 659471591. The reversal of 659471561 is 165174956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 659471561 - 2²⁶ = 592362697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659471591) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 644765 + ... + 645786.

It is an arithmetic number, because the mean of its divisors is an integer number (95500848).

Almost surely, 2^659471561 is an apocalyptic number.

It is an amenable number.

659471561 is a deficient number, since it is larger than the sum of its proper divisors (104535223).

659471561 is a wasteful number, since it uses less digits than its factorization.

659471561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290631.

The product of its digits is 226800, while the sum is 44.

The square root of 659471561 is about 25680.1783677606. The cubic root of 659471561 is about 870.4263383615.

The spelling of 659471561 in words is "six hundred fifty-nine million, four hundred seventy-one thousand, five hundred sixty-one".