6649410668 has 36 divisors (see below), whose sum is σ = 12629024856. Its totient is φ = 3052761600.

The previous prime is 6649410661. The next prime is 6649410671. The reversal of 6649410668 is 8660149466.

It is not an unprimeable number, because it can be changed into a prime (6649410661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85223 + ... + 143393.

It is an arithmetic number, because the mean of its divisors is an integer number (350806246).

Almost surely, 2^6649410668 is an apocalyptic number.

6649410668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6649410668 is a deficient number, since it is larger than the sum of its proper divisors (5979614188).

6649410668 is a wasteful number, since it uses less digits than its factorization.

6649410668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58274 (or 58231 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The square root of 6649410668 is about 81543.9186451080. The cubic root of 6649410668 is about 1880.4468030388.

The spelling of 6649410668 in words is "six billion, six hundred forty-nine million, four hundred ten thousand, six hundred sixty-eight".