659659 has 16 divisors (see below), whose sum is σ = 887040. Its totient is φ = 473760.

The previous prime is 659657. The next prime is 659669. The reversal of 659659 is 956956.

It is not a de Polignac number, because 659659 - 2¹ = 659657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (659653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672 + ... + 1330.

It is an arithmetic number, because the mean of its divisors is an integer number (55440).

2⁶⁵⁹⁶⁵⁹ is an apocalyptic number.

659659 is a deficient number, since it is larger than the sum of its proper divisors (227381).

659659 is a wasteful number, since it uses less digits than its factorization.

659659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690.

The product of its digits is 72900, while the sum is 40.

The square root of 659659 is about 812.1939423561. The cubic root of 659659 is about 87.0508796498.

The spelling of 659659 in words is "six hundred fifty-nine thousand, six hundred fifty-nine".