6610220520 has 64 divisors (see below), whose sum is σ = 20470371840. Its totient is φ = 1705862400.

The previous prime is 6610220509. The next prime is 6610220521. The reversal of 6610220520 is 250220166.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (6610220521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 884751 + ... + 892190.

It is an arithmetic number, because the mean of its divisors is an integer number (319849560).

Almost surely, 2^6610220520 is an apocalyptic number.

6610220520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6610220520 is an abundant number, since it is smaller than the sum of its proper divisors (13860151320).

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

6610220520 is a wasteful number, since it uses less digits than its factorization.

6610220520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776986 (or 1776982 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 6610220520 is about 81303.2626651600. The cubic root of 6610220520 is about 1876.7452095814.

Adding to 6610220520 its reverse (250220166), we get a palindrome (6860440686).

The spelling of 6610220520 in words is "six billion, six hundred ten million, two hundred twenty thousand, five hundred twenty".