820027966 has 16 divisors (see below), whose sum is σ = 1268877456. Its totient is φ = 397166976.

The previous prime is 820027909. The next prime is 820028021. The reversal of 820027966 is 669720028.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7611 + ... + 41206.

It is an arithmetic number, because the mean of its divisors is an integer number (79304841).

Almost surely, 2^820027966 is an apocalyptic number.

820027966 is a deficient number, since it is larger than the sum of its proper divisors (448849490).

820027966 is a wasteful number, since it uses less digits than its factorization.

820027966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49083.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 820027966 is about 28636.1304299306. The cubic root of 820027966 is about 936.0008028033. Note that the first 3 decimals are identical.

The spelling of 820027966 in words is "eight hundred twenty million, twenty-seven thousand, nine hundred sixty-six".