611130660 has 192 divisors, whose sum is σ = 2026708992. Its totient is φ = 134705664.

The previous prime is 611130647. The next prime is 611130661. The reversal of 611130660 is 66031116.

It is a self number, because there is not a number n which added to its sum of digits gives 611130660.

It is not an unprimeable number, because it can be changed into a prime (611130661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1638234 + ... + 1638606.

It is an arithmetic number, because the mean of its divisors is an integer number (10555776).

Almost surely, 2^611130660 is an apocalyptic number.

611130660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611130660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1013354496).

611130660 is an abundant number, since it is smaller than the sum of its proper divisors (1415578332).

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

611130660 is a wasteful number, since it uses less digits than its factorization.

611130660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 611130660 is about 24721.0570162362. The cubic root of 611130660 is about 848.6162769047.

Adding to 611130660 its reverse (66031116), we get a palindrome (677161776).

The spelling of 611130660 in words is "six hundred eleven million, one hundred thirty thousand, six hundred sixty".