6640608695836 has 24 divisors (see below), whose sum is σ = 11651605109424. Its totient is φ = 3311580883200.

The previous prime is 6640608695821. The next prime is 6640608695839. The reversal of 6640608695836 is 6385968060466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640608695839) 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 7 ways as a sum of consecutive naturals, for example, 11873751 + ... + 12420433.

It is an arithmetic number, because the mean of its divisors is an integer number (485483546226).

Almost surely, 2^{6640608695836} is an apocalyptic number.

It is an amenable number.

6640608695836 is a deficient number, since it is larger than the sum of its proper divisors (5010996413588).

6640608695836 is a wasteful number, since it uses less digits than its factorization.

6640608695836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554661 (or 554659 counting only the distinct ones).

The product of its (nonzero) digits is 268738560, while the sum is 67.

The spelling of 6640608695836 in words is "six trillion, six hundred forty billion, six hundred eight million, six hundred ninety-five thousand, eight hundred thirty-six".