659677 has 4 divisors (see below), whose sum is σ = 662076. Its totient is φ = 657280.

The previous prime is 659671. The next prime is 659689. The reversal of 659677 is 776956.

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

It can be written as a sum of positive squares in 2 ways, for example, as 125316 + 534361 = 354^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 659677 - 2³ = 659669 is a prime.

It is a Duffinian number.

659677 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (165519).

2⁶⁵⁹⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

659677 is a deficient number, since it is larger than the sum of its proper divisors (2399).

659677 is a wasteful number, since it uses less digits than its factorization.

659677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398.

The product of its digits is 79380, while the sum is 40.

The square root of 659677 is about 812.2050233777. The cubic root of 659677 is about 87.0516714233.

The spelling of 659677 in words is "six hundred fifty-nine thousand, six hundred seventy-seven".