6649410660 has 48 divisors (see below), whose sum is σ = 18760496832. Its totient is φ = 1759638400.

The previous prime is 6649410643. The next prime is 6649410661. The reversal of 6649410660 is 660149466.

It is not an unprimeable number, because it can be changed into a prime (6649410661) 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, 415131 + ... + 430850.

It is an arithmetic number, because the mean of its divisors is an integer number (390843684).

Almost surely, 2^6649410660 is an apocalyptic number.

6649410660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6649410660 is an abundant number, since it is smaller than the sum of its proper divisors (12111086172).

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

6649410660 is a wasteful number, since it uses less digits than its factorization.

6649410660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846124 (or 846122 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 6649410660 is about 81543.9185960547. The cubic root of 6649410660 is about 1880.4468022847.

The spelling of 6649410660 in words is "six billion, six hundred forty-nine million, four hundred ten thousand, six hundred sixty".