613668 has 24 divisors (see below), whose sum is σ = 1562400. Its totient is φ = 185920.

The previous prime is 613667. The next prime is 613673. The reversal of 613668 is 866316.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2193 + ... + 2456.

It is an arithmetic number, because the mean of its divisors is an integer number (65100).

2⁶¹³⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

613668 is an abundant number, since it is smaller than the sum of its proper divisors (948732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

613668 is a wasteful number, since it uses less digits than its factorization.

613668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667 (or 4665 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 613668 is about 783.3696445485. The cubic root of 613668 is about 84.9789105695.

The spelling of 613668 in words is "six hundred thirteen thousand, six hundred sixty-eight".