616660 has 24 divisors (see below), whose sum is σ = 1413216. Its totient is φ = 224160.

The previous prime is 616643. The next prime is 616669. The reversal of 616660 is 66616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616669) by changing a digit.

616660 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 7 ways as a sum of consecutive naturals, for example, 1182 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (58884).

2⁶¹⁶⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

616660 is an abundant number, since it is smaller than the sum of its proper divisors (796556).

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

616660 is a wasteful number, since it uses less digits than its factorization.

616660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823 (or 2821 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 616660 is about 785.2770211842. The cubic root of 616660 is about 85.1167944621.

It can be divided in two parts, 6166 and 60, that added together give a palindrome (6226).

The spelling of 616660 in words is "six hundred sixteen thousand, six hundred sixty".