6650782811 has 4 divisors (see below), whose sum is σ = 6865324224. Its totient is φ = 6436241400.

The previous prime is 6650782807. The next prime is 6650782813. The reversal of 6650782811 is 1182870566.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1182870566 = 2 ⋅591435283.

It is a cyclic number.

It is not a de Polignac number, because 6650782811 - 2² = 6650782807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6650782813) 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 3 ways as a sum of consecutive naturals, for example, 107270660 + ... + 107270721.

It is an arithmetic number, because the mean of its divisors is an integer number (1716331056).

Almost surely, 2^6650782811 is an apocalyptic number.

6650782811 is a deficient number, since it is larger than the sum of its proper divisors (214541413).

6650782811 is a wasteful number, since it uses less digits than its factorization.

6650782811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214541412.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 6650782811 is about 81552.3317324526. The cubic root of 6650782811 is about 1880.5761410400.

The spelling of 6650782811 in words is "six billion, six hundred fifty million, seven hundred eighty-two thousand, eight hundred eleven".