821283366 has 8 divisors (see below), whose sum is σ = 1642566744. Its totient is φ = 273761120.

The previous prime is 821283349. The next prime is 821283373. The reversal of 821283366 is 663382128.

821283366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

821283366 is an admirable number.

It is a congruent number.

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, 68440275 + ... + 68440286.

It is an arithmetic number, because the mean of its divisors is an integer number (205320843).

Almost surely, 2^821283366 is an apocalyptic number.

821283366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821283366 is a wasteful number, since it uses less digits than its factorization.

821283366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136880566.

The product of its digits is 82944, while the sum is 39.

The square root of 821283366 is about 28658.0419079881. The cubic root of 821283366 is about 936.4782077724.

The spelling of 821283366 in words is "eight hundred twenty-one million, two hundred eighty-three thousand, three hundred sixty-six".