6441699660 has 48 divisors (see below), whose sum is σ = 19676466432. Its totient is φ = 1561624000.

The previous prime is 6441699647. The next prime is 6441699661. The reversal of 6441699660 is 669961446.

It is not an unprimeable number, because it can be changed into a prime (6441699661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4879416 + ... + 4880735.

It is an arithmetic number, because the mean of its divisors is an integer number (409926384).

Almost surely, 2^6441699660 is an apocalyptic number.

6441699660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6441699660 is an abundant number, since it is smaller than the sum of its proper divisors (13234766772).

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

6441699660 is a wasteful number, since it uses less digits than its factorization.

6441699660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9760174 (or 9760172 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The square root of 6441699660 is about 80260.1997256423. The cubic root of 6441699660 is about 1860.6591547469.

The spelling of 6441699660 in words is "six billion, four hundred forty-one million, six hundred ninety-nine thousand, six hundred sixty".