6646112887 has 4 divisors (see below), whose sum is σ = 6649842160.
Its totient is φ = 6642383616.
The previous prime is 6646112873. The next prime is 6646112897. The reversal of 6646112887 is 7882116466.
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 6646112887 - 211 = 6646110839 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 6646112887.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (6646112897) 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, 1861962 + ... + 1865527.
It is an arithmetic number, because the mean of its divisors is an integer number (1662460540).
Almost surely, 26646112887 is an apocalyptic number.
6646112887 is a deficient number, since it is larger than the sum of its proper divisors (3729273).
6646112887 is a wasteful number, since it uses less digits than its factorization.
6646112887 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3729272.
The product of its digits is 774144, while the sum is 49.
The square root of 6646112887 is about 81523.6952486821.
The cubic root of 6646112887 is about 1880.1358818905.
The spelling of 6646112887 in words is "six billion, six hundred forty-six million, one hundred twelve thousand, eight hundred eighty-seven".