6644911011 has 4 divisors (see below), whose sum is σ = 8859881352. Its totient is φ = 4429940672.

The previous prime is 6644910929. The next prime is 6644911019. The reversal of 6644911011 is 1101194466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6644911011 - 2²⁵ = 6611356579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6644911019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107485166 + ... + 1107485171.

It is an arithmetic number, because the mean of its divisors is an integer number (2214970338).

Almost surely, 2^6644911011 is an apocalyptic number.

6644911011 is a deficient number, since it is larger than the sum of its proper divisors (2214970341).

6644911011 is a wasteful number, since it uses less digits than its factorization.

6644911011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214970340.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 6644911011 is about 81516.3235861383. The cubic root of 6644911011 is about 1880.0225411323.

The spelling of 6644911011 in words is "six billion, six hundred forty-four million, nine hundred eleven thousand, eleven".