821066882 has 8 divisors (see below), whose sum is σ = 1234021500. Its totient is φ = 409726384.

The previous prime is 821066881. The next prime is 821066947. The reversal of 821066882 is 288660128.

It can be written as a sum of positive squares in 2 ways, for example, as 797554081 + 23512801 = 28241^2 + 4849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (821066881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402257 + ... + 404292.

Almost surely, 2^821066882 is an apocalyptic number.

821066882 is a deficient number, since it is larger than the sum of its proper divisors (412954618).

821066882 is a wasteful number, since it uses less digits than its factorization.

821066882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807060.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 821066882 is about 28654.2646389678. The cubic root of 821066882 is about 936.3959177159.

It can be divided in two parts, 82106 and 6882, that added together give a palindrome (88988).

The spelling of 821066882 in words is "eight hundred twenty-one million, sixty-six thousand, eight hundred eighty-two".