6646828620 has 24 divisors (see below), whose sum is σ = 18611120304. Its totient is φ = 1772487616.

The previous prime is 6646828597. The next prime is 6646828621. The reversal of 6646828620 is 268286466.

It is a super-2 number, since 2×6646828620² = 88360661407302208800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6646828620.

It is not an unprimeable number, because it can be changed into a prime (6646828621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55390179 + ... + 55390298.

It is an arithmetic number, because the mean of its divisors is an integer number (775463346).

Almost surely, 2^6646828620 is an apocalyptic number.

6646828620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6646828620 is an abundant number, since it is smaller than the sum of its proper divisors (11964291684).

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

6646828620 is a wasteful number, since it uses less digits than its factorization.

6646828620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110780489 (or 110780487 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 48.

The square root of 6646828620 is about 81528.0848542390. The cubic root of 6646828620 is about 1880.2033713145.

The spelling of 6646828620 in words is "six billion, six hundred forty-six million, eight hundred twenty-eight thousand, six hundred twenty".