6496777668 has 48 divisors (see below), whose sum is σ = 15362887680. Its totient is φ = 2136529824.

The previous prime is 6496777657. The next prime is 6496777669. The reversal of 6496777668 is 8667776946.

Its product of digits (128024064) is a multiple of the sum of its prime factors (5376).

It is a junction number, because it is equal to n+sod(n) for n = 6496777599 and 6496777608.

It is not an unprimeable number, because it can be changed into a prime (6496777669) 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 15 ways as a sum of consecutive naturals, for example, 2147605 + ... + 2150627.

It is an arithmetic number, because the mean of its divisors is an integer number (320060160).

Almost surely, 2^6496777668 is an apocalyptic number.

It is an amenable number.

6496777668 is an abundant number, since it is smaller than the sum of its proper divisors (8866110012).

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

6496777668 is a wasteful number, since it uses less digits than its factorization.

6496777668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5376 (or 5374 counting only the distinct ones).

The product of its digits is 128024064, while the sum is 66.

The square root of 6496777668 is about 80602.5909509117. The cubic root of 6496777668 is about 1865.9471328141.

The spelling of 6496777668 in words is "six billion, four hundred ninety-six million, seven hundred seventy-seven thousand, six hundred sixty-eight".