6611165220 has 48 divisors (see below), whose sum is σ = 20194106688. Its totient is φ = 1602706560.

The previous prime is 6611165191. The next prime is 6611165257. The reversal of 6611165220 is 225611166.

It is a super-2 number, since 2×6611165220² = 87415011132275296800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5007799 + ... + 5009118.

It is an arithmetic number, because the mean of its divisors is an integer number (420710556).

Almost surely, 2^6611165220 is an apocalyptic number.

6611165220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6611165220 is an abundant number, since it is smaller than the sum of its proper divisors (13582941468).

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

6611165220 is a wasteful number, since it uses less digits than its factorization.

6611165220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10016940 (or 10016938 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 6611165220 is about 81309.0721875487. The cubic root of 6611165220 is about 1876.8346103682.

Adding to 6611165220 its reverse (225611166), we get a palindrome (6836776386).

The spelling of 6611165220 in words is "six billion, six hundred eleven million, one hundred sixty-five thousand, two hundred twenty".