611668 has 12 divisors (see below), whose sum is σ = 1107540. Its totient is φ = 295232.

The previous prime is 611657. The next prime is 611671. The reversal of 611668 is 866116.

611668 = 37² + 38² + ... + 123².

611668 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 311364 + 300304 = 558^2 + 548^2 .

It is a nialpdrome in base 4 and base 16.

It is a congruent number.

It is an unprimeable number.

611668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2521 + ... + 2752.

It is an arithmetic number, because the mean of its divisors is an integer number (92295).

2⁶¹¹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

611668 is a deficient number, since it is larger than the sum of its proper divisors (495872).

611668 is a wasteful number, since it uses less digits than its factorization.

611668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306 (or 5304 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 611668 is about 782.0920661917. The cubic root of 611668 is about 84.8864920891.

The spelling of 611668 in words is "six hundred eleven thousand, six hundred sixty-eight".