613217660 has 48 divisors (see below), whose sum is σ = 1412056800. Its totient is φ = 221840640.

The previous prime is 613217653. The next prime is 613217719. The reversal of 613217660 is 66712316.

613217660 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36266 + ... + 50414.

It is an arithmetic number, because the mean of its divisors is an integer number (29417850).

Almost surely, 2^613217660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 613217660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (706028400).

613217660 is an abundant number, since it is smaller than the sum of its proper divisors (798839140).

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

613217660 is a wasteful number, since it uses less digits than its factorization.

613217660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14366 (or 14364 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 613217660 is about 24763.2320184583. The cubic root of 613217660 is about 849.5811823679.

Adding to 613217660 its reverse (66712316), we get a palindrome (679929976).

The spelling of 613217660 in words is "six hundred thirteen million, two hundred seventeen thousand, six hundred sixty".