6887821412 has 12 divisors (see below), whose sum is σ = 12083749356. Its totient is φ = 3435321600.

The previous prime is 6887821403. The next prime is 6887821429. The reversal of 6887821412 is 2141287886.

It can be written as a sum of positive squares in 2 ways, for example, as 3934551076 + 2953270336 = 62726^2 + 54344^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145473 + ... + 2148680.

It is an arithmetic number, because the mean of its divisors is an integer number (1006979113).

Almost surely, 2^6887821412 is an apocalyptic number.

It is an amenable number.

6887821412 is a deficient number, since it is larger than the sum of its proper divisors (5195927944).

6887821412 is a wasteful number, since it uses less digits than its factorization.

6887821412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4294558 (or 4294556 counting only the distinct ones).

The product of its digits is 344064, while the sum is 47.

The square root of 6887821412 is about 82992.8997685947. The cubic root of 6887821412 is about 1902.6575380363.

The spelling of 6887821412 in words is "six billion, eight hundred eighty-seven million, eight hundred twenty-one thousand, four hundred twelve".